diff --git a/API.md b/API.md
index e105ca4..0feef0f 100644
--- a/API.md
+++ b/API.md
@@ -3,6 +3,8 @@
 Endpoint reference for the Marketplace Backoffice.  
 Base URL: `https://your-api-domain.com/api`
 
+> 🇷🇺 Документация на русском языке: [API.ru.md](./API.ru.md)
+
 ---
 
 ## Projects
@@ -237,6 +239,16 @@ Response 200:
         { "key": "Storage", "value": "256GB" }
       ],
       "subcategoryId": "sub1",
+      "translations": {
+        "ru": {
+          "name": "iPhone 15 Про",
+          "simpleDescription": "Последний iPhone...",
+          "description": [
+            { "key": "Цвет", "value": "Чёрный" },
+            { "key": "Память", "value": "256 ГБ" }
+          ]
+        }
+      },
       "comments": [
         {
           "id": "c1",
@@ -280,7 +292,16 @@ Body:
   "simpleDescription": "Short description",
   "description": [
     { "key": "Size", "value": "Large" }
-  ]
+  ],
+  "translations": {                    // optional - localized content for marketplace
+    "ru": {
+      "name": "Новый товар",
+      "simpleDescription": "Краткое описание",
+      "description": [
+        { "key": "Размер", "value": "Большой" }
+      ]
+    }
+  }
 }
 
 Response 201: (created item object)
@@ -369,6 +390,7 @@ Response 201:
 - `badges`: optional string array. Predefined values with UI colors: `new`, `sale`, `exclusive`, `hot`, `limited`, `bestseller`, `featured`. Custom strings are also allowed.
 - `imgs`: always send the **complete** array on update, not individual images.
 - `description`: array of `{ key, value }` pairs - free-form attributes per item.
+- `translations`: optional object keyed by language code (`"ru"`, `"en"`, etc.) — each value may contain `name`, `simpleDescription`, `description[]`. The marketplace frontend should use these when rendering in the corresponding language, falling back to the default fields if a translation is absent.
 - Auto-save from the backoffice fires `PATCH` with a single field every ~500 ms.
 
 ---
@@ -423,3 +445,60 @@ The `id` field on subcategories is editable via `PATCH` to allow renaming slugs.
 | Category | all subcategories (recursive) and their items |
 | Subcategory | all nested subcategories (recursive) and their items |
 | Item | nothing else |
+
+---
+
+## Internationalization (i18n)
+
+The API supports localized content for items and categories via the `translations` field.
+
+### `translations` object structure
+
+Any entity that supports translations accepts the same nested shape:
+
+```json
+{
+  "translations": {
+    "ru": {
+      "name": "Название",
+      "simpleDescription": "Краткое описание",
+      "description": [
+        { "key": "Цвет", "value": "Чёрный" }
+      ]
+    }
+  }
+}
+```
+
+- Keys are ISO 639-1 language codes (`"ru"`, `"en"`, etc.).
+- All sub-fields are optional — omit what you don't need.
+- Currently supported in the backoffice: `ru` (Russian).
+
+### Requesting a Specific Language
+
+Pass `?lang=ru` to any GET endpoint. The backend will:
+
+1. Return the default top-level fields as-is.
+2. Merge the matching `translations[lang]` values into the response, overwriting the default fields.
+3. Fall back gracefully to the default language if no translation exists for the requested lang.
+
+```
+GET /api/items/:itemId?lang=ru
+GET /api/subcategories/:subcategoryId/items?lang=ru
+```
+
+Alternatively, you can use the `Accept-Language` header:
+
+```
+Accept-Language: ru
+```
+
+### Fallback Behaviour
+
+| Scenario | Returned value |
+|---|---|
+| Translation exists for requested lang | Translated value |
+| Translation missing for requested lang | Default (base) field value |
+| `lang` param omitted | Default (base) field value |
+
+> 🇷🇺 See [API.ru.md](./API.ru.md) for full documentation in Russian.
diff --git a/API.ru.md b/API.ru.md
new file mode 100644
index 0000000..35b8c07
--- /dev/null
+++ b/API.ru.md
@@ -0,0 +1,503 @@
+# Документация API
+
+Справочник эндпоинтов для бэкофиса маркетплейса.  
+Базовый URL: `https://your-api-domain.com/api`
+
+> 🇬🇧 English documentation: [API.md](./API.md)
+
+---
+
+## Проекты
+
+### Получить все проекты
+```
+GET /api/projects
+
+Ответ 200:
+[
+  {
+    "id": "dexar",
+    "name": "dexar",
+    "displayName": "Dexar Marketplace",
+    "active": true,
+    "logoUrl": "https://..."
+  }
+]
+```
+
+---
+
+## Категории
+
+### Получить категории проекта
+```
+GET /api/projects/:projectId/categories
+
+Ответ 200:
+[
+  {
+    "id": "cat1",
+    "name": "Электроника",
+    "visible": true,
+    "priority": 1,
+    "img": "https://...",
+    "projectId": "dexar",
+    "subcategories": [ ...Subcategory[] ],
+    "translations": {
+      "ru": { "name": "Электроника" }
+    }
+  }
+]
+```
+
+### Получить категорию по ID
+```
+GET /api/categories/:categoryId
+
+Ответ 200: (объект категории с вложенными подкатегориями)
+```
+
+### Создать категорию
+```
+POST /api/projects/:projectId/categories
+
+Тело запроса:
+{
+  "name": "Новая категория",     // обязательно
+  "visible": true,
+  "priority": 10,
+  "img": "https://...",
+  "translations": {              // опционально
+    "ru": { "name": "Новая категория" }
+  }
+}
+
+Ответ 201: (созданный объект категории)
+```
+
+### Обновить категорию
+```
+PATCH /api/categories/:categoryId
+
+Тело запроса: (любое подмножество полей)
+{
+  "name": "Обновлённое название",
+  "visible": false,
+  "priority": 5,
+  "translations": {
+    "ru": { "name": "Обновлённое название" }
+  }
+}
+
+Ответ 200: (обновлённый объект категории)
+```
+
+### Удалить категорию
+```
+DELETE /api/categories/:categoryId
+
+Ответ 204 No Content
+
+Примечание: каскадно удаляет все подкатегории и товары внутри
+```
+
+---
+
+## Подкатегории
+
+Подкатегории **рекурсивны** — вложенность неограничена. Единственное ограничение:
+**подкатегория с товарами не может иметь дочерних подкатегорий** (и наоборот).
+
+### Объект подкатегории
+```json
+{
+  "id": "sub1",
+  "name": "Смартфоны",
+  "visible": true,
+  "priority": 1,
+  "img": "https://...",
+  "categoryId": "cat1",        // всегда ID корневой категории
+  "parentId": "cat1",          // ID прямого родителя (категория или подкатегория)
+  "itemCount": 15,
+  "hasItems": true,
+  "subcategories": [],         // дочерние подкатегории (пусто, если hasItems = true)
+  "translations": {
+    "ru": { "name": "Смартфоны" }
+  }
+}
+```
+
+> `categoryId` — всегда ID **корневой категории** этого поддерева.  
+> `parentId` — ID **прямого родителя**: может быть ID категории или подкатегории.
+
+---
+
+### Получить подкатегории категории
+```
+GET /api/categories/:categoryId/subcategories
+
+Ответ 200: Subcategory[] (вложенные подкатегории рекурсивно заполнены)
+```
+
+### Получить подкатегорию по ID
+```
+GET /api/subcategories/:subcategoryId
+
+Ответ 200: объект подкатегории (с вложенными подкатегориями при наличии)
+```
+
+### Создать подкатегорию в категории (уровень 1)
+```
+POST /api/categories/:categoryId/subcategories
+
+Тело запроса:
+{
+  "id": "custom-id",        // опционально, генерируется автоматически (используется в URL)
+  "name": "Смартфоны",      // обязательно
+  "visible": true,
+  "priority": 10,
+  "translations": {
+    "ru": { "name": "Смартфоны" }
+  }
+}
+
+Ответ 201: (созданный объект подкатегории)
+Ошибка 400: если категория не существует
+```
+
+### Создать подкатегорию в подкатегории (уровень 2+, вложенная)
+```
+POST /api/subcategories/:parentSubcategoryId/subcategories
+
+Тело запроса:
+{
+  "id": "custom-id",    // опционально
+  "name": "Apple",      // обязательно
+  "visible": true,
+  "priority": 10
+}
+
+Ответ 201: (созданный объект подкатегории)
+Ошибка 400: если родительская подкатегория содержит товары (hasItems = true)
+Ошибка 404: если родительская подкатегория не найдена
+```
+
+### Обновить подкатегорию
+```
+PATCH /api/subcategories/:subcategoryId
+
+Тело запроса: (любое подмножество полей)
+{
+  "id": "new-slug",         // ID редактируется — используется в URL маркетплейса
+  "name": "Новое название",
+  "visible": false,
+  "priority": 3,
+  "translations": {
+    "ru": { "name": "Новое название" }
+  }
+}
+
+Ответ 200: (обновлённый объект подкатегории)
+```
+
+### Удалить подкатегорию
+```
+DELETE /api/subcategories/:subcategoryId
+
+Ответ 204 No Content
+
+Примечание: каскадно удаляет все вложенные подкатегории и товары
+```
+
+---
+
+## Товары
+
+Товары всегда принадлежат **самой глубокой подкатегории** в иерархии (листовой узел).
+Подкатегория с хотя бы одним товаром имеет `hasItems: true` и не может принимать дочерние подкатегории.
+
+### Получить товары (с пагинацией)
+```
+GET /api/subcategories/:subcategoryId/items
+
+Query-параметры:
+  page     number   (по умолчанию: 1)
+  limit    number   (по умолчанию: 20)
+  search   string   опционально — фильтр по названию (без учёта регистра)
+  visible  boolean  опционально — фильтр по видимости
+  tags     string   опционально — теги через запятую
+  lang     string   опционально — код языка (en | ru); влияет на поля names/descriptions в ответе
+
+Ответ 200:
+{
+  "items": [
+    {
+      "id": "item1",
+      "name": "iPhone 15 Pro",
+      "visible": true,
+      "priority": 1,
+      "quantity": 50,
+      "price": 1299,
+      "currency": "USD",
+      "imgs": ["https://...", "https://..."],
+      "tags": ["new", "featured"],
+      "badges": ["new", "exclusive"],
+      "simpleDescription": "Последний iPhone...",
+      "description": [
+        { "key": "Цвет", "value": "Чёрный" },
+        { "key": "Память", "value": "256 ГБ" }
+      ],
+      "subcategoryId": "sub1",
+      "translations": {
+        "ru": {
+          "name": "iPhone 15 Pro",
+          "simpleDescription": "Последний iPhone с корпусом из титана",
+          "description": [
+            { "key": "Цвет", "value": "Чёрный" },
+            { "key": "Память", "value": "256 ГБ" }
+          ]
+        }
+      },
+      "comments": [
+        {
+          "id": "c1",
+          "text": "Отличный товар!",
+          "author": "Иван",
+          "stars": 5,
+          "createdAt": "2024-01-10T10:30:00Z"
+        }
+      ]
+    }
+  ],
+  "total": 150,
+  "page": 1,
+  "limit": 20,
+  "hasMore": true
+}
+```
+
+### Получить товар по ID
+```
+GET /api/items/:itemId
+
+Query-параметры:
+  lang  string  опционально (en | ru)
+
+Ответ 200: (полный объект товара)
+```
+
+### Создать товар
+```
+POST /api/subcategories/:subcategoryId/items
+
+Тело запроса:
+{
+  "name": "Новый товар",              // обязательно
+  "visible": true,
+  "priority": 10,
+  "quantity": 100,
+  "price": 999,
+  "currency": "USD",                  // USD | EUR | RUB | GBP | UAH
+  "imgs": ["https://..."],
+  "tags": ["new"],
+  "badges": ["new", "exclusive"],     // опционально — стандартные или свои метки
+  "simpleDescription": "Краткое описание",
+  "description": [
+    { "key": "Размер", "value": "Большой" }
+  ],
+  "translations": {                   // опционально
+    "ru": {
+      "name": "Новый товар",
+      "simpleDescription": "Краткое описание",
+      "description": [
+        { "key": "Размер", "value": "Большой" }
+      ]
+    }
+  }
+}
+
+Ответ 201: (созданный объект товара)
+
+Побочный эффект: устанавливает hasItems = true на подкатегории.
+                 Подкатегория больше не может принимать дочерние подкатегории.
+```
+
+### Обновить товар
+```
+PATCH /api/items/:itemId
+
+Тело запроса: (любое подмножество полей)
+{
+  "name": "Новое название",
+  "price": 899,
+  "quantity": 80,
+  "visible": false,
+  "translations": {
+    "ru": { "name": "Новое название" }
+  }
+}
+
+Ответ 200: (обновлённый объект товара)
+```
+
+**Обновление изображений — всегда передавай полный массив:**
+```
+PATCH /api/items/:itemId
+
+Тело запроса:
+{
+  "imgs": ["https://new1.jpg", "https://new2.jpg"]
+}
+
+Ответ 200: (обновлённый объект товара)
+```
+
+### Удалить товар
+```
+DELETE /api/items/:itemId
+
+Ответ 204 No Content
+
+Побочный эффект: если в подкатегории не осталось товаров — hasItems становится false.
+                 Подкатегория снова может принимать дочерние подкатегории.
+```
+
+### Массовое обновление товаров
+```
+PATCH /api/items/bulk
+
+Тело запроса:
+{
+  "itemIds": ["item1", "item2", "item3"],
+  "data": {
+    "visible": true
+  }
+}
+
+Ответ 204 No Content
+```
+
+---
+
+## Загрузка файлов
+
+### Загрузить изображение
+```
+POST /api/upload
+
+Тело запроса: multipart/form-data
+  image: File
+
+Ответ 201:
+{
+  "url": "https://cdn.example.com/uploads/abc123.jpg"
+}
+```
+
+---
+
+## Мультиязычность (i18n)
+
+Поля `name`, `simpleDescription` и `description` поддерживают переводы через объект `translations`.
+
+### Структура объекта переводов
+```json
+{
+  "translations": {
+    "ru": {
+      "name": "Название на русском",
+      "simpleDescription": "Описание на русском",
+      "description": [
+        { "key": "Ключ", "value": "Значение" }
+      ]
+    }
+  }
+}
+```
+
+> Основные поля (`name`, `simpleDescription`, `description`) хранятся на **английском** (по умолчанию).  
+> Переводы хранятся в `translations[langCode].*`.
+
+### Запрос конкретного языка
+Передай параметр `?lang=ru` в GET-запросах. Бэкенд должен:
+1. Вернуть `translations.ru.*` там, где перевод заполнен.
+2. Откатиться к основному полю (английскому), если перевод отсутствует.
+
+```
+GET /api/items/:itemId?lang=ru
+GET /api/subcategories/:subcategoryId/items?lang=ru&page=1
+```
+
+Альтернативно — заголовок `Accept-Language: ru`.
+
+### Поддерживаемые языки
+| Код | Язык     |
+|-----|----------|
+| en  | Английский (по умолчанию) |
+| ru  | Русский  |
+
+---
+
+## Примечания
+
+- Все ответы — JSON.
+- Используй `PATCH` для частичного обновления — передавай только изменяемые поля.
+- `priority`: меньшее число — выше в списке.
+- Поддерживаемые значения `currency`: `USD`, `EUR`, `RUB`, `GBP`, `UAH`.
+- `badges`: необязательный массив строк. Стандартные значения с цветами в интерфейсе: `new`, `sale`, `exclusive`, `hot`, `limited`, `bestseller`, `featured`. Свои строки тоже допустимы.
+- `imgs`: при обновлении всегда передавай **полный** массив, не отдельные изображения.
+- `description`: массив пар `{ key, value }` — свободные атрибуты товара.
+- Автосохранение из бэкофиса отправляет `PATCH` с одним полем каждые ~500 мс.
+
+---
+
+## Бизнес-правила
+
+### Вложенные подкатегории
+
+Иерархия выглядит так:
+
+```
+Категория (напр. Электроника)
+  Подкатегория L1 (напр. Кухня)         <- можно добавлять детей ИЛИ товары, не оба
+    Подкатегория L2 (напр. Большая кухня) <- то же правило
+      Подкатегория L3 (напр. Духовки)    <- если есть товары — это листовой узел
+        Товары...
+```
+
+Правила:
+- Категория всегда может принимать новые подкатегории (категории никогда не хранят товары напрямую).
+- Подкатегория с товарами (`hasItems: true`) **не может** принимать дочерние подкатегории.
+  - `POST /api/subcategories/:id/subcategories` на узел с `hasItems: true` → `400 Bad Request`.
+- Подкатегория с дочерними подкатегориями не может принимать товары (товары только в листовых узлах).
+- При создании **первого товара** в подкатегории → `hasItems` становится `true`.
+- При удалении **последнего товара** → `hasItems` становится `false`; дочерние подкатегории снова можно добавлять.
+
+### Структура URL (фронтенд маркетплейса)
+
+Поля `id` подкатегорий и товаров используются напрямую в URL маркетплейса:
+
+```
+/{categoryId}/{sub1Id}/{sub2Id}/.../{itemId}
+
+Примеры:
+  /electronics/smartphones/iphone-15
+  /electronics/smartphones/apple/iphone-15-pro
+  /furniture/living-room/sofas/corner-sofa-modelo
+```
+
+Поле `id` подкатегорий редактируется через `PATCH` для переименования слагов.
+
+### Комментарии
+
+- `stars` — опционально, целое число от 1 до 5.
+- `author` — опционально (анонимные комментарии допустимы).
+- `createdAt` — строка в формате ISO 8601.
+
+### Каскадное удаление
+
+| Удаляемый объект | Также удаляется |
+|---|---|
+| Категория | все подкатегории (рекурсивно) и их товары |
+| Подкатегория | все вложенные подкатегории (рекурсивно) и их товары |
+| Товар | ничего больше |
diff --git a/src/app/i18n/translations.ts b/src/app/i18n/translations.ts
new file mode 100644
index 0000000..960ac91
--- /dev/null
+++ b/src/app/i18n/translations.ts
@@ -0,0 +1,234 @@
+// Add new languages by name here — no other files need to change.
+export const TRANSLATIONS: Record<string, Record<string, string>> = {
+  en: {
+    // --- Dashboard ---
+    MARKETPLACE_BACKOFFICE: 'Marketplace Backoffice',
+    ACTIVE: 'Active',
+    INACTIVE: 'Inactive',
+    PROJECTS: 'Projects',
+
+    // --- Navigation / Project view ---
+    CATEGORIES: 'Categories',
+    ADD_CATEGORY: 'Add Category',
+    ADD_SUBCATEGORY: 'Add Subcategory',
+    VIEW_ITEMS: 'View Items',
+    WELCOME_TO: 'Welcome to',
+    BACKOFFICE: 'Backoffice',
+    SELECT_FROM_SIDEBAR: 'Select a category or subcategory from the sidebar to start editing.',
+
+    // --- Common editor ---
+    EDIT: 'Edit',
+    EDIT_CATEGORY: 'Edit Category',
+    EDIT_SUBCATEGORY: 'Edit Subcategory',
+    EDIT_ITEM: 'Edit Item',
+    NAME: 'Name',
+    ID: 'ID',
+    PRIORITY: 'Priority',
+    PRIORITY_HINT: 'Lower numbers appear first',
+    VISIBLE: 'Visible',
+    IMAGE_URL: 'Or enter image URL',
+    UPLOAD_IMAGE: 'Upload Image',
+    IMAGE: 'Image',
+    SAVING: 'Saving...',
+    SAVE: 'Save',
+    DELETE: 'Delete',
+    DELETE_CATEGORY: 'Delete Category',
+    DELETE_SUBCATEGORY: 'Delete Subcategory',
+    TOGGLE_VISIBILITY: 'Toggle Visibility',
+    PREVIEW: 'Preview',
+    CANCEL: 'Cancel',
+    CREATE: 'Create',
+    SUBCATEGORIES: 'Subcategories',
+    NO_SUBCATEGORIES: 'No subcategories yet',
+
+    // --- Item editor tabs ---
+    BASIC_INFO: 'Basic Info',
+    IMAGES: 'Images',
+    TAGS: 'Tags',
+    BADGES: 'Badges',
+    DESCRIPTION: 'Description',
+    COMMENTS: 'Comments',
+    TRANSLATIONS: 'Translations',
+
+    // --- Item basic fields ---
+    ITEM_NAME: 'Item Name',
+    PRICE: 'Price',
+    QUANTITY: 'Quantity',
+    CURRENCY: 'Currency',
+    SIMPLE_DESCRIPTION: 'Simple Description',
+
+    // --- Tags / Badges ---
+    ADD_TAG: 'Add Tag',
+    ADD_BADGE: 'Custom Badge',
+    TAG_PLACEHOLDER: 'e.g. new, sale, featured',
+    BADGE_PLACEHOLDER: 'e.g. pre-order',
+    NO_TAGS: 'No tags yet',
+    NO_BADGES: 'No badges yet',
+    PREDEFINED_BADGES: 'Predefined Badges',
+    PREDEFINED_BADGES_HINT: 'Toggle badges to highlight this item in the marketplace.',
+    CUSTOM_BADGES: 'Custom Badges',
+
+    // --- Description tab ---
+    DESC_HINT: 'Add structured information like color, size, material, etc.',
+    DESC_KEY: 'Key',
+    DESC_VALUE: 'Value',
+    DESC_KEY_PLACEHOLDER: 'e.g. Color',
+    DESC_VALUE_PLACEHOLDER: 'e.g. Red',
+
+    // --- Comments ---
+    NO_COMMENTS: 'No comments yet',
+    NO_IMAGES: 'No images yet',
+    NO_DESC_FIELDS: 'No description fields yet',
+    ADD_FIELD: 'Add Field',
+    QTY: 'Qty',
+    ITEMS_COUNT: 'items',
+    IN_STOCK: 'In stock',
+    OUT_OF_STOCK: 'Out of stock',
+    OUT_OF_STOCK_BANNER: 'Out of Stock',
+    ITEM_NOT_FOUND: 'Item not found',
+    GO_BACK: 'Go back',
+    SECTION_BADGES: 'Badges',
+    SECTION_TAGS: 'Tags',
+
+    // --- Items list ---
+    SEARCH_ITEMS: 'Search items',
+    SEARCH_PLACEHOLDER: 'Search by name...',
+    VISIBILITY: 'Visibility',
+    ALL: 'All',
+    HIDDEN: 'Hidden',
+    SELECTED: 'selected',
+    NO_ITEMS_FOUND: 'No items found',
+    LOADING_MORE: 'Loading more items...',
+    NO_MORE_ITEMS: 'No more items to load',
+    SHOW: 'Show',
+    HIDE: 'Hide',
+
+    // --- Translations tab ---
+    TRANSLATIONS_HINT: 'Fill in translations for marketplace localization.',
+    TRANSLATIONS_LANG_LABEL: 'Russian Translation (RU)',
+    NAME_TRANSLATED: 'Name (Russian)',
+    SIMPLE_DESC_TRANSLATED: 'Simple Description (Russian)',
+    DESC_TRANSLATED: 'Description (Russian)',
+    DESC_KEY_RU: 'Key (RU)',
+    DESC_VALUE_RU: 'Value (RU)',
+    ADD_DESC_ROW: 'Add Row',
+    NO_TRANSLATIONS: 'No Russian translation yet',
+    TRANSLATION_SAVED: 'Translation saved',
+  },
+
+  ru: {
+    // --- Dashboard ---
+    MARKETPLACE_BACKOFFICE: 'Бэкофис маркетплейса',
+    ACTIVE: 'Активен',
+    INACTIVE: 'Неактивен',
+    PROJECTS: 'Проекты',
+
+    // --- Navigation / Project view ---
+    CATEGORIES: 'Категории',
+    ADD_CATEGORY: 'Добавить категорию',
+    ADD_SUBCATEGORY: 'Добавить подкатегорию',
+    VIEW_ITEMS: 'Товары',
+    WELCOME_TO: 'Добро пожаловать,',
+    BACKOFFICE: 'Бэкофис',
+    SELECT_FROM_SIDEBAR: 'Выберите категорию или подкатегорию в боковом меню для редактирования.',
+
+    // --- Common editor ---
+    EDIT: 'Редактировать',
+    EDIT_CATEGORY: 'Редактировать категорию',
+    EDIT_SUBCATEGORY: 'Редактировать подкатегорию',
+    EDIT_ITEM: 'Редактировать товар',
+    NAME: 'Название',
+    ID: 'ID',
+    PRIORITY: 'Приоритет',
+    PRIORITY_HINT: 'Меньшее число — выше в списке',
+    VISIBLE: 'Видимый',
+    IMAGE_URL: 'Или введите URL изображения',
+    UPLOAD_IMAGE: 'Загрузить фото',
+    IMAGE: 'Изображение',
+    SAVING: 'Сохранение...',
+    SAVE: 'Сохранить',
+    DELETE: 'Удалить',
+    DELETE_CATEGORY: 'Удалить категорию',
+    DELETE_SUBCATEGORY: 'Удалить подкатегорию',
+    TOGGLE_VISIBILITY: 'Переключить видимость',
+    PREVIEW: 'Предпросмотр',
+    CANCEL: 'Отмена',
+    CREATE: 'Создать',
+    SUBCATEGORIES: 'Подкатегории',
+    NO_SUBCATEGORIES: 'Нет подкатегорий',
+
+    // --- Item editor tabs ---
+    BASIC_INFO: 'Основное',
+    IMAGES: 'Изображения',
+    TAGS: 'Теги',
+    BADGES: 'Метки',
+    DESCRIPTION: 'Описание',
+    COMMENTS: 'Комментарии',
+    TRANSLATIONS: 'Переводы',
+
+    // --- Item basic fields ---
+    ITEM_NAME: 'Название товара',
+    PRICE: 'Цена',
+    QUANTITY: 'Количество',
+    CURRENCY: 'Валюта',
+    SIMPLE_DESCRIPTION: 'Краткое описание',
+
+    // --- Tags / Badges ---
+    ADD_TAG: 'Добавить тег',
+    ADD_BADGE: 'Своя метка',
+    TAG_PLACEHOLDER: 'напр. новинка, распродажа',
+    BADGE_PLACEHOLDER: 'напр. предзаказ',
+    NO_TAGS: 'Тегов нет',
+    NO_BADGES: 'Меток нет',
+    PREDEFINED_BADGES: 'Стандартные метки',
+    PREDEFINED_BADGES_HINT: 'Включите метки для выделения товара на маркетплейсе.',
+    CUSTOM_BADGES: 'Свои метки',
+
+    // --- Description tab ---
+    DESC_HINT: 'Добавьте характеристики: цвет, размер, материал и т.д.',
+    DESC_KEY: 'Ключ',
+    DESC_VALUE: 'Значение',
+    DESC_KEY_PLACEHOLDER: 'напр. Цвет',
+    DESC_VALUE_PLACEHOLDER: 'напр. Красный',
+
+    // --- Comments ---
+    NO_COMMENTS: 'Комментариев нет',
+    NO_IMAGES: 'Изображений нет',
+    NO_DESC_FIELDS: 'Полей описания нет',
+    ADD_FIELD: 'Добавить поле',
+    QTY: 'Кол-во',
+    ITEMS_COUNT: 'товаров',
+    IN_STOCK: 'В наличии',
+    OUT_OF_STOCK: 'Нет в наличии',
+    OUT_OF_STOCK_BANNER: 'Нет в наличии',
+    ITEM_NOT_FOUND: 'Товар не найден',
+    GO_BACK: 'Назад',
+    SECTION_BADGES: 'Метки',
+    SECTION_TAGS: 'Теги',
+
+    // --- Items list ---
+    SEARCH_ITEMS: 'Поиск товаров',
+    SEARCH_PLACEHOLDER: 'Поиск по названию...',
+    VISIBILITY: 'Видимость',
+    ALL: 'Все',
+    HIDDEN: 'Скрытые',
+    SELECTED: 'выбрано',
+    NO_ITEMS_FOUND: 'Товары не найдены',
+    LOADING_MORE: 'Загружаем товары...',
+    NO_MORE_ITEMS: 'Все товары загружены',
+    SHOW: 'Показать',
+    HIDE: 'Скрыть',
+
+    // --- Translations tab ---
+    TRANSLATIONS_HINT: 'Переводы для локализации маркетплейса.',
+    TRANSLATIONS_LANG_LABEL: 'Русский перевод (RU)',
+    NAME_TRANSLATED: 'Название (Русский)',
+    SIMPLE_DESC_TRANSLATED: 'Краткое описание (Русский)',
+    DESC_TRANSLATED: 'Описание (Русский)',
+    DESC_KEY_RU: 'Ключ (RU)',
+    DESC_VALUE_RU: 'Значение (RU)',
+    ADD_DESC_ROW: 'Добавить строку',
+    NO_TRANSLATIONS: 'Русский перевод не заполнен',
+    TRANSLATION_SAVED: 'Перевод сохранён',
+  },
+};
diff --git a/src/app/models/category.model.ts b/src/app/models/category.model.ts
index aef5c5a..be7c020 100644
--- a/src/app/models/category.model.ts
+++ b/src/app/models/category.model.ts
@@ -1,3 +1,11 @@
+/**
+ * Per-language translation content for a category or subcategory.
+ * Stored under `translations['ru']`, `translations['en']`, etc.
+ */
+export interface CategoryTranslation {
+  name?: string;
+}
+
 export interface Category {
   id: string;
   name: string;
@@ -6,6 +14,8 @@ export interface Category {
   img?: string;
   projectId: string;
   subcategories?: Subcategory[];
+  /** Optional translations keyed by language code: { ru: { name: '...' } } */
+  translations?: { [lang: string]: CategoryTranslation };
 }
 
 export interface Subcategory {
@@ -21,4 +31,6 @@ export interface Subcategory {
   itemCount?: number;
   subcategories?: Subcategory[];
   hasItems?: boolean;
+  /** Optional translations keyed by language code: { ru: { name: '...' } } */
+  translations?: { [lang: string]: CategoryTranslation };
 }
diff --git a/src/app/models/item.model.ts b/src/app/models/item.model.ts
index 9b1a9a2..b15f3bb 100644
--- a/src/app/models/item.model.ts
+++ b/src/app/models/item.model.ts
@@ -1,3 +1,12 @@
+/**
+ * Per-language translation content for an item.
+ */
+export interface ItemTranslation {
+  name?: string;
+  simpleDescription?: string;
+  description?: ItemDescriptionField[];
+}
+
 export interface Item {
   id: string;
   name: string;
@@ -13,6 +22,8 @@ export interface Item {
   description: ItemDescriptionField[];
   subcategoryId: string;
   comments?: Comment[];
+  /** Optional translations keyed by language code: { ru: { name: '...', simpleDescription: '...', description: [...] } } */
+  translations?: { [lang: string]: ItemTranslation };
 }
 
 export interface ItemDescriptionField {
diff --git a/src/app/pages/category-editor/category-editor.component.html b/src/app/pages/category-editor/category-editor.component.html
index 76102cc..aae8c2c 100644
--- a/src/app/pages/category-editor/category-editor.component.html
+++ b/src/app/pages/category-editor/category-editor.component.html
@@ -6,30 +6,18 @@
       <button mat-icon-button (click)="goBack()">
         <mat-icon>close</mat-icon>
       </button>
-      <h2>Edit Category</h2>
+      <h2>{{ 'EDIT_CATEGORY' | translate }}</h2>
       @if (saving()) {
-        <span class="save-indicator">Saving...</span>
+        <span class="save-indicator">{{ 'SAVING' | translate }}</span>
       }
-      <button mat-icon-button color="warn" (click)="deleteCategory()" matTooltip="Delete Category">
+      <button mat-icon-button color="warn" (click)="deleteCategory()" [matTooltip]="'DELETE_CATEGORY' | translate">
         <mat-icon>delete</mat-icon>
       </button>
     </div>
 
     <div class="editor-content">
       <mat-form-field appearance="outline" class="full-width">
-        <mat-label>Name</mat-label>
-        <input 
-          matInput 
-          [(ngModel)]="category()!.name"
-          (blur)="onFieldChange('name', category()!.name)"
-          required>
-        @if (!category()!.name || category()!.name.trim().length === 0) {
-          <mat-error>Category name is required</mat-error>
-        }
-      </mat-form-field>
-
-      <mat-form-field appearance="outline" class="full-width">
-        <mat-label>ID</mat-label>
+        <mat-label>{{ 'NAME' | translate }}</mat-label>
         <input matInput [value]="category()!.id" disabled>
       </mat-form-field>
 
@@ -38,12 +26,12 @@
           [(ngModel)]="category()!.visible"
           (change)="onFieldChange('visible', category()!.visible)"
           color="primary">
-          Visible
+          {{ 'VISIBLE' | translate }}
         </mat-slide-toggle>
       </div>
 
       <mat-form-field appearance="outline" class="full-width">
-        <mat-label>Priority</mat-label>
+        <mat-label>{{ 'PRIORITY' | translate }}</mat-label>
         <input 
           matInput 
           type="number"
@@ -51,14 +39,14 @@
           (blur)="onFieldChange('priority', category()!.priority)"
           required
           min="0">
-        <mat-hint>Lower numbers appear first</mat-hint>
+        <mat-hint>{{ 'PRIORITY_HINT' | translate }}</mat-hint>
         @if (category()!.priority < 0) {
-          <mat-error>Priority cannot be negative</mat-error>
+          <mat-error>{{ 'PRIORITY_HINT' | translate }}</mat-error>
         }
       </mat-form-field>
 
       <div class="image-section">
-        <h3>Image</h3>
+        <h3>{{ 'IMAGE' | translate }}</h3>
         
         @if (category()!.img) {
           <div class="image-preview">
@@ -70,7 +58,7 @@
           <div class="upload-option">
             <label for="file-upload" class="upload-label">
               <mat-icon>upload_file</mat-icon>
-              Upload Image
+              {{ 'UPLOAD_IMAGE' | translate }}
             </label>
             <input 
               id="file-upload"
@@ -81,7 +69,7 @@
           </div>
 
           <mat-form-field appearance="outline" class="full-width">
-            <mat-label>Or enter image URL</mat-label>
+            <mat-label>{{ 'IMAGE_URL' | translate }}</mat-label>
             <input 
               matInput
               [value]="category()!.img || ''"
@@ -92,8 +80,8 @@
 
       <div class="subcategories-section">
         <div class="section-header">
-          <h3>Subcategories ({{ category()!.subcategories?.length || 0 }})</h3>
-          <button mat-mini-fab color="primary" (click)="addSubcategory()" matTooltip="Add Subcategory">
+          <h3>{{ 'SUBCATEGORIES' | translate }} ({{ category()!.subcategories?.length || 0 }})</h3>
+          <button mat-mini-fab color="primary" (click)="addSubcategory()" [matTooltip]="'ADD_SUBCATEGORY' | translate">
             <mat-icon>add</mat-icon>
           </button>
         </div>
@@ -103,7 +91,7 @@
             @for (sub of category()!.subcategories; track sub.id) {
               <mat-list-item (click)="openSubcategory(sub.id)">
                 <span matListItemTitle>{{ sub.name }}</span>
-                <span matListItemLine>Priority: {{ sub.priority }}</span>
+                <span matListItemLine>{{ 'PRIORITY' | translate }}: {{ sub.priority }}</span>
                 <button mat-icon-button matListItemMeta>
                   <mat-icon>chevron_right</mat-icon>
                 </button>
@@ -111,9 +99,18 @@
             }
           </mat-list>
         } @else {
-          <p class="empty-state">No subcategories yet</p>
+          <p class="empty-state">{{ 'NO_SUBCATEGORIES' | translate }}</p>
         }
       </div>
+
+      <div class="translations-section">
+        <h3>{{ 'TRANSLATIONS' | translate }}</h3>
+        <p class="hint">{{ 'TRANSLATIONS_HINT' | translate }}</p>
+        <mat-form-field appearance="outline" class="full-width">
+          <mat-label>{{ 'NAME_TRANSLATED' | translate }}</mat-label>
+          <input matInput [(ngModel)]="ruName" (blur)="saveRuName(ruName)" [placeholder]="'NAME_TRANSLATED' | translate">
+        </mat-form-field>
+      </div>
     </div>
   }
 </div>
diff --git a/src/app/pages/category-editor/category-editor.component.ts b/src/app/pages/category-editor/category-editor.component.ts
index 0f80cf3..e49b2b6 100644
--- a/src/app/pages/category-editor/category-editor.component.ts
+++ b/src/app/pages/category-editor/category-editor.component.ts
@@ -10,12 +10,15 @@ import { MatIconModule } from '@angular/material/icon';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 import { MatSnackBar, MatSnackBarModule } from '@angular/material/snack-bar';
 import { MatListModule } from '@angular/material/list';
+import { MatTooltipModule } from '@angular/material/tooltip';
 import { MatDialog, MatDialogModule } from '@angular/material/dialog';
 import { ApiService } from '../../services';
 import { Category } from '../../models';
 import { LoadingSkeletonComponent } from '../../components/loading-skeleton/loading-skeleton.component';
 import { CreateDialogComponent } from '../../components/create-dialog/create-dialog.component';
 import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-dialog.component';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 @Component({
   selector: 'app-category-editor',
@@ -32,7 +35,9 @@ import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-
     MatSnackBarModule,
     MatListModule,
     MatDialogModule,
-    LoadingSkeletonComponent
+    MatTooltipModule,
+    LoadingSkeletonComponent,
+    TranslatePipe
   ],
   templateUrl: './category-editor.component.html',
   styleUrls: ['./category-editor.component.scss']
@@ -44,12 +49,16 @@ export class CategoryEditorComponent implements OnInit {
   categoryId = signal<string>('');
   projectId = signal<string>('');
 
+  /** Local buffer for the Russian translation of the category name */
+  ruName = '';
+
   constructor(
     private route: ActivatedRoute,
     private router: Router,
     private apiService: ApiService,
     private snackBar: MatSnackBar,
-    private dialog: MatDialog
+    private dialog: MatDialog,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
@@ -70,6 +79,7 @@ export class CategoryEditorComponent implements OnInit {
     this.apiService.getCategory(this.categoryId()).subscribe({
       next: (category) => {
         this.category.set(category);
+        this.ruName = category.translations?.['ru']?.name || '';
         this.loading.set(false);
       },
       error: (err) => {
@@ -80,6 +90,14 @@ export class CategoryEditorComponent implements OnInit {
     });
   }
 
+  saveRuName(value: string) {
+    const cat = this.category();
+    if (!cat) return;
+    cat.translations = cat.translations || {};
+    cat.translations['ru'] = { ...(cat.translations['ru'] || {}), name: value };
+    this.onFieldChange('translations' as any, cat.translations);
+  }
+
   onFieldChange(field: keyof Category, value: any) {
     this.saving.set(true);
     this.apiService.queueSave('category', this.categoryId(), field, value);
diff --git a/src/app/pages/item-editor/item-editor.component.html b/src/app/pages/item-editor/item-editor.component.html
index 09bddfb..4f73f68 100644
--- a/src/app/pages/item-editor/item-editor.component.html
+++ b/src/app/pages/item-editor/item-editor.component.html
@@ -7,15 +7,15 @@
         <button mat-icon-button (click)="goBack()">
           <mat-icon>close</mat-icon>
         </button>
-        <h2>Edit Item</h2>
+        <h2>{{ 'EDIT_ITEM' | translate }}</h2>
       </div>
       <div style="display: flex; align-items: center; gap: 12px;">
         @if (saving()) {
-          <span class="save-indicator">Saving...</span>
+          <span class="save-indicator">{{ 'SAVING' | translate }}</span>
         }
         <button mat-raised-button color="accent" (click)="previewInMarketplace()">
           <mat-icon>open_in_new</mat-icon>
-          Preview
+          {{ 'PREVIEW' | translate }}
         </button>
         <button mat-icon-button color="warn" (click)="deleteItem()">
           <mat-icon>delete</mat-icon>
@@ -25,10 +25,10 @@
 
     <mat-tab-group class="editor-tabs">
       <!-- Basic Info Tab -->
-      <mat-tab label="Basic Info">
+      <mat-tab [label]="'BASIC_INFO' | translate">
         <div class="tab-content">
           <mat-form-field appearance="outline" class="full-width">
-            <mat-label>Name</mat-label>
+            <mat-label>{{ 'ITEM_NAME' | translate }}</mat-label>
             <input 
               matInput 
               [(ngModel)]="item()!.name"
@@ -49,23 +49,23 @@
               [(ngModel)]="item()!.visible"
               (change)="onFieldChange('visible', item()!.visible)"
               color="primary">
-              Visible
+              {{ 'VISIBLE' | translate }}
             </mat-slide-toggle>
           </div>
 
           <div class="form-row">
             <mat-form-field appearance="outline" class="half-width">
-              <mat-label>Priority</mat-label>
+              <mat-label>{{ 'PRIORITY' | translate }}</mat-label>
               <input 
                 matInput 
                 type="number"
                 [(ngModel)]="item()!.priority"
                 (blur)="onFieldChange('priority', item()!.priority)">
-              <mat-hint>Lower numbers appear first</mat-hint>
+              <mat-hint>{{ 'PRIORITY_HINT' | translate }}</mat-hint>
             </mat-form-field>
 
             <mat-form-field appearance="outline" class="half-width">
-              <mat-label>Quantity</mat-label>
+              <mat-label>{{ 'QUANTITY' | translate }}</mat-label>
               <input 
                 matInput 
                 type="number"
@@ -81,7 +81,7 @@
 
           <div class="form-row">
             <mat-form-field appearance="outline" class="half-width">
-              <mat-label>Price</mat-label>
+              <mat-label>{{ 'PRICE' | translate }}</mat-label>
               <input 
                 matInput 
                 type="number"
@@ -96,7 +96,7 @@
             </mat-form-field>
 
             <mat-form-field appearance="outline" class="half-width">
-              <mat-label>Currency</mat-label>
+              <mat-label>{{ 'CURRENCY' | translate }}</mat-label>
               <mat-select 
                 [(ngModel)]="item()!.currency"
                 (selectionChange)="onFieldChange('currency', item()!.currency)">
@@ -108,7 +108,7 @@
           </div>
 
           <mat-form-field appearance="outline" class="full-width">
-            <mat-label>Simple Description</mat-label>
+            <mat-label>{{ 'SIMPLE_DESCRIPTION' | translate }}</mat-label>
             <textarea 
               matInput 
               rows="4"
@@ -120,7 +120,7 @@
       </mat-tab>
 
       <!-- Images Tab -->
-      <mat-tab label="Images">
+      <mat-tab [label]="'IMAGES' | translate">
         <div class="tab-content">
           <div class="images-section">
             <div class="upload-area">
@@ -162,7 +162,7 @@
             @if (!item()!.imgs.length) {
               <div class="empty-images">
                 <mat-icon>image</mat-icon>
-                <p>No images yet</p>
+                <p>{{ 'NO_IMAGES' | translate }}</p>
               </div>
             }
           </div>
@@ -170,17 +170,17 @@
       </mat-tab>
 
       <!-- Tags Tab -->
-      <mat-tab label="Tags">
+      <mat-tab [label]="'TAGS' | translate">
         <div class="tab-content">
           <div class="tags-section">
             <div class="add-tag-form">
               <mat-form-field appearance="outline" class="tag-input">
-                <mat-label>Add Tag</mat-label>
+                <mat-label>{{ 'ADD_TAG' | translate }}</mat-label>
                 <input 
                   matInput 
                   [(ngModel)]="newTag"
                   (keyup.enter)="addTag()"
-                  placeholder="e.g. new, sale, featured">
+                  [placeholder]="'TAG_PLACEHOLDER' | translate">
               </mat-form-field>
               <button mat-raised-button color="primary" (click)="addTag()">
                 <mat-icon>add</mat-icon>
@@ -202,7 +202,7 @@
             @if (!item()!.tags.length) {
               <div class="empty-state">
                 <mat-icon>label</mat-icon>
-                <p>No tags yet</p>
+                <p>{{ 'NO_TAGS' | translate }}</p>
               </div>
             }
           </div>
@@ -210,11 +210,11 @@
       </mat-tab>
 
       <!-- Badges Tab -->
-      <mat-tab label="Badges">
+      <mat-tab [label]="'BADGES' | translate">
         <div class="tab-content">
           <div class="badges-section">
-            <h3>Predefined Badges</h3>
-            <p class="hint">Toggle badges to highlight this item in the marketplace.</p>
+            <h3>{{ 'PREDEFINED_BADGES' | translate }}</h3>
+            <p class="hint">{{ 'PREDEFINED_BADGES_HINT' | translate }}</p>
             <div class="predefined-badges">
               @for (badge of predefinedBadges; track badge.value) {
                 <button
@@ -230,15 +230,15 @@
               }
             </div>
 
-            <h3 style="margin-top: 1.5rem">Custom Badges</h3>
+            <h3 style="margin-top: 1.5rem">{{ 'CUSTOM_BADGES' | translate }}</h3>
             <div class="add-badge-form">
               <mat-form-field appearance="outline" class="badge-input">
-                <mat-label>Custom Badge</mat-label>
+                <mat-label>{{ 'ADD_BADGE' | translate }}</mat-label>
                 <input
                   matInput
                   [(ngModel)]="newBadge"
                   (keyup.enter)="addCustomBadge()"
-                  placeholder="e.g. pre-order">
+                  [placeholder]="'BADGE_PLACEHOLDER' | translate">
               </mat-form-field>
               <button mat-raised-button color="primary" (click)="addCustomBadge()">
                 <mat-icon>add</mat-icon>
@@ -260,7 +260,7 @@
             @if (!(item()!.badges?.length)) {
               <div class="empty-state">
                 <mat-icon>new_releases</mat-icon>
-                <p>No badges yet</p>
+                <p>{{ 'NO_BADGES' | translate }}</p>
               </div>
             }
           </div>
@@ -268,27 +268,27 @@
       </mat-tab>
 
       <!-- Detailed Description Tab -->
-      <mat-tab label="Description">
+      <mat-tab [label]="'DESCRIPTION' | translate">
         <div class="tab-content">
           <div class="description-section">
-            <h3>Key-Value Description Fields</h3>
-            <p class="hint">Add structured information like color, size, material, etc.</p>
+            <h3>{{ 'DESCRIPTION' | translate }}</h3>
+            <p class="hint">{{ 'DESC_HINT' | translate }}</p>
 
             <div class="add-desc-form">
               <mat-form-field appearance="outline">
-                <mat-label>Key</mat-label>
+                <mat-label>{{ 'DESC_KEY' | translate }}</mat-label>
                 <input 
                   matInput 
                   [(ngModel)]="newDescKey"
-                  placeholder="e.g. Color">
+                  [placeholder]="'DESC_KEY_PLACEHOLDER' | translate">
               </mat-form-field>
               
               <mat-form-field appearance="outline">
-                <mat-label>Value</mat-label>
+                <mat-label>{{ 'DESC_VALUE' | translate }}</mat-label>
                 <input 
                   matInput 
                   [(ngModel)]="newDescValue"
-                  placeholder="e.g. Black">
+                  [placeholder]="'DESC_VALUE_PLACEHOLDER' | translate">
               </mat-form-field>
               
               <button 
@@ -296,7 +296,7 @@
                 color="primary" 
                 (click)="addDescriptionField()">
                 <mat-icon>add</mat-icon>
-                Add Field
+                {{ 'ADD_FIELD' | translate }}
               </button>
             </div>
 
@@ -304,7 +304,7 @@
               @for (field of item()!.description; track $index) {
                 <div class="desc-field-row">
                   <mat-form-field appearance="outline">
-                    <mat-label>Key</mat-label>
+                    <mat-label>{{ 'DESC_KEY' | translate }}</mat-label>
                     <input 
                       matInput 
                       [value]="field.key"
@@ -312,7 +312,7 @@
                   </mat-form-field>
                   
                   <mat-form-field appearance="outline">
-                    <mat-label>Value</mat-label>
+                    <mat-label>{{ 'DESC_VALUE' | translate }}</mat-label>
                     <input 
                       matInput 
                       [value]="field.value"
@@ -332,7 +332,7 @@
             @if (!item()!.description.length) {
               <div class="empty-state">
                 <mat-icon>description</mat-icon>
-                <p>No description fields yet</p>
+                <p>{{ 'NO_DESC_FIELDS' | translate }}</p>
               </div>
             }
           </div>
@@ -340,7 +340,7 @@
       </mat-tab>
 
       <!-- Comments Tab -->
-      <mat-tab label="Comments">
+      <mat-tab [label]="'COMMENTS' | translate">
         <div class="tab-content">
           <div class="comments-section">
             @if (item()!.comments?.length) {
@@ -369,12 +369,62 @@
             } @else {
               <div class="empty-state">
                 <mat-icon>comment</mat-icon>
-                <p>No comments yet</p>
+                <p>{{ 'NO_COMMENTS' | translate }}</p>
               </div>
             }
           </div>
         </div>
       </mat-tab>
+
+      <!-- Translations Tab -->
+      <mat-tab [label]="'TRANSLATIONS' | translate">
+        <div class="tab-content">
+          <div class="translations-section">
+            <p class="hint">{{ 'TRANSLATIONS_HINT' | translate }}</p>
+
+            <mat-form-field appearance="outline" class="full-width">
+              <mat-label>{{ 'NAME_TRANSLATED' | translate }}</mat-label>
+              <input matInput [(ngModel)]="ruName" [placeholder]="'NAME_TRANSLATED' | translate">
+            </mat-form-field>
+
+            <mat-form-field appearance="outline" class="full-width">
+              <mat-label>{{ 'SIMPLE_DESC_TRANSLATED' | translate }}</mat-label>
+              <textarea matInput rows="3" [(ngModel)]="ruSimpleDesc"></textarea>
+            </mat-form-field>
+
+            <h3>{{ 'DESC_TRANSLATED' | translate }}</h3>
+            <div class="desc-fields-list">
+              @for (field of ruDescFields; track $index) {
+                <div class="desc-field-row">
+                  <mat-form-field appearance="outline">
+                    <mat-label>{{ 'DESC_KEY_RU' | translate }}</mat-label>
+                    <input matInput [value]="field.key" (blur)="updateRuDescField($index, 'key', $any($event.target).value)">
+                  </mat-form-field>
+                  <mat-form-field appearance="outline">
+                    <mat-label>{{ 'DESC_VALUE_RU' | translate }}</mat-label>
+                    <input matInput [value]="field.value" (blur)="updateRuDescField($index, 'value', $any($event.target).value)">
+                  </mat-form-field>
+                  <button mat-icon-button color="warn" (click)="removeRuDescRow($index)">
+                    <mat-icon>delete</mat-icon>
+                  </button>
+                </div>
+              }
+            </div>
+
+            <button mat-stroked-button (click)="addRuDescRow()">
+              <mat-icon>add</mat-icon>
+              {{ 'ADD_DESC_ROW' | translate }}
+            </button>
+
+            <div style="margin-top: 1.5rem">
+              <button mat-raised-button color="primary" (click)="saveItemTranslations()">
+                <mat-icon>save</mat-icon>
+                {{ 'SAVE' | translate }}
+              </button>
+            </div>
+          </div>
+        </div>
+      </mat-tab>
     </mat-tab-group>
   }
 </div>
diff --git a/src/app/pages/item-editor/item-editor.component.ts b/src/app/pages/item-editor/item-editor.component.ts
index e0e43f8..0feb541 100644
--- a/src/app/pages/item-editor/item-editor.component.ts
+++ b/src/app/pages/item-editor/item-editor.component.ts
@@ -19,6 +19,8 @@ import { ValidationService } from '../../services/validation.service';
 import { Item, ItemDescriptionField, Subcategory } from '../../models';
 import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-dialog.component';
 import { LoadingSkeletonComponent } from '../../components/loading-skeleton/loading-skeleton.component';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 @Component({
   selector: 'app-item-editor',
@@ -38,7 +40,8 @@ import { LoadingSkeletonComponent } from '../../components/loading-skeleton/load
     MatTabsModule,
     MatDialogModule,
     DragDropModule,
-    LoadingSkeletonComponent
+    LoadingSkeletonComponent,
+    TranslatePipe
   ],
   templateUrl: './item-editor.component.html',
   styleUrls: ['./item-editor.component.scss']
@@ -57,6 +60,11 @@ export class ItemEditorComponent implements OnInit {
   newDescValue = '';
   uploadingImages = signal<boolean>(false);
 
+  /** Russian translation buffers */
+  ruName = '';
+  ruSimpleDesc = '';
+  ruDescFields: ItemDescriptionField[] = [];
+
   currencies = ['USD', 'EUR', 'RUB', 'GBP', 'UAH'];
 
   predefinedBadges: { label: string; value: string; color: string }[] = [
@@ -77,7 +85,8 @@ export class ItemEditorComponent implements OnInit {
     private apiService: ApiService,
     private snackBar: MatSnackBar,
     private dialog: MatDialog,
-    private validationService: ValidationService
+    private validationService: ValidationService,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
@@ -98,6 +107,11 @@ export class ItemEditorComponent implements OnInit {
     this.apiService.getItem(this.itemId()).subscribe({
       next: (item) => {
         this.item.set(item);
+        // Initialise Russian translation buffers
+        const ru = item.translations?.['ru'];
+        this.ruName = ru?.name || '';
+        this.ruSimpleDesc = ru?.simpleDescription || '';
+        this.ruDescFields = ru?.description ? [...ru.description] : [];
         // Load subcategory to get allowed description fields
         this.loadSubcategory(item.subcategoryId);
       },
@@ -252,6 +266,34 @@ export class ItemEditorComponent implements OnInit {
     this.onFieldChange('badges', badges);
   }
 
+  // Russian translation methods
+  saveItemTranslations() {
+    const currentItem = this.item();
+    if (!currentItem) return;
+    currentItem.translations = currentItem.translations || {};
+    currentItem.translations['ru'] = {
+      name: this.ruName,
+      simpleDescription: this.ruSimpleDesc,
+      description: this.ruDescFields.filter(f => f.key.trim() || f.value.trim()),
+    };
+    this.onFieldChange('translations' as any, currentItem.translations);
+    this.snackBar.open(this.lang.t('TRANSLATION_SAVED'), '', { duration: 2000 });
+  }
+
+  addRuDescRow() {
+    this.ruDescFields = [...this.ruDescFields, { key: '', value: '' }];
+  }
+
+  removeRuDescRow(index: number) {
+    this.ruDescFields = this.ruDescFields.filter((_, i) => i !== index);
+  }
+
+  updateRuDescField(index: number, field: 'key' | 'value', value: string) {
+    this.ruDescFields = this.ruDescFields.map((f, i) =>
+      i === index ? { ...f, [field]: value } : f
+    );
+  }
+
   // Description fields handling
   addDescriptionField() {
     if (!this.newDescKey.trim() || !this.newDescValue.trim()) return;
diff --git a/src/app/pages/item-preview/item-preview.component.html b/src/app/pages/item-preview/item-preview.component.html
index 1e4630d..c6f9c2c 100644
--- a/src/app/pages/item-preview/item-preview.component.html
+++ b/src/app/pages/item-preview/item-preview.component.html
@@ -6,12 +6,12 @@
     </button>
     <span class="preview-label">
       <mat-icon>visibility</mat-icon>
-      Preview
+      {{ 'PREVIEW' | translate }}
     </span>
     <span class="spacer"></span>
     <button mat-raised-button color="primary" (click)="openEdit()">
       <mat-icon>edit</mat-icon>
-      Edit Item
+      {{ 'EDIT_ITEM' | translate }}
     </button>
   </div>
 
@@ -33,13 +33,13 @@
           } @else {
             <div class="no-image">
               <mat-icon>image</mat-icon>
-              <span>No image</span>
+              <span>{{ 'NO_IMAGES' | translate }}</span>
             </div>
           }
 
           <!-- Out of stock overlay -->
           @if (item.quantity === 0) {
-            <div class="oos-banner">Out of Stock</div>
+            <div class="oos-banner">{{ 'OUT_OF_STOCK_BANNER' | translate }}</div>
           }
 
           <!-- Badges overlay -->
@@ -76,12 +76,12 @@
           @if (item.quantity > 0) {
             <span class="in-stock">
               <mat-icon>check_circle</mat-icon>
-              In stock ({{ item.quantity }})
+              {{ 'IN_STOCK' | translate }} ({{ item.quantity }})
             </span>
           } @else {
             <span class="out-of-stock">
               <mat-icon>cancel</mat-icon>
-              Out of stock
+              {{ 'OUT_OF_STOCK' | translate }}
             </span>
           }
         </div>
@@ -108,7 +108,7 @@
         <!-- Badges -->
         @if (item.badges?.length) {
           <div class="section">
-            <span class="section-label">Badges</span>
+            <span class="section-label">{{ 'SECTION_BADGES' | translate }}</span>
             <div class="badges-row">
               @for (badge of item.badges || []; track badge) {
                 <span class="badge-chip" [style.background-color]="badgeColor(badge)">{{ badge }}</span>
@@ -120,7 +120,7 @@
         <!-- Tags -->
         @if (item?.tags?.length) {
           <div class="section">
-            <span class="section-label">Tags</span>
+            <span class="section-label">{{ 'SECTION_TAGS' | translate }}</span>
             <div class="tags-row">
               @for (tag of item.tags; track tag) {
                 <mat-chip>{{ tag }}</mat-chip>
@@ -131,12 +131,12 @@
 
         <!-- Meta -->
         <div class="meta-row">
-          <span>Priority: {{ item.priority }}</span>
+          <span>{{ 'PRIORITY' | translate }}: {{ item.priority }}</span>
           <span>
             <mat-icon [class.icon-visible]="item.visible" [class.icon-hidden]="!item.visible">
               {{ item.visible ? 'visibility' : 'visibility_off' }}
             </mat-icon>
-            {{ item.visible ? 'Visible' : 'Hidden' }}
+            {{ item.visible ? ('VISIBLE' | translate) : ('HIDDEN' | translate) }}
           </span>
         </div>
       </div>
@@ -145,8 +145,8 @@
   } @else {
     <div class="empty-state">
       <mat-icon>error_outline</mat-icon>
-      <p>Item not found</p>
-      <button mat-button (click)="goBack()">Go back</button>
+      <p>{{ 'ITEM_NOT_FOUND' | translate }}</p>
+      <button mat-button (click)="goBack()">{{ 'GO_BACK' | translate }}</button>
     </div>
   }
 </div>
diff --git a/src/app/pages/item-preview/item-preview.component.ts b/src/app/pages/item-preview/item-preview.component.ts
index ecafd75..35f1dee 100644
--- a/src/app/pages/item-preview/item-preview.component.ts
+++ b/src/app/pages/item-preview/item-preview.component.ts
@@ -9,6 +9,8 @@ import { MatDividerModule } from '@angular/material/divider';
 import { ApiService } from '../../services';
 import { Item } from '../../models';
 import { LoadingSkeletonComponent } from '../../components/loading-skeleton/loading-skeleton.component';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 interface BadgeDef { value: string; color: string; }
 
@@ -23,6 +25,7 @@ interface BadgeDef { value: string; color: string; }
     MatProgressSpinnerModule,
     MatDividerModule,
     LoadingSkeletonComponent,
+    TranslatePipe,
   ],
   templateUrl: './item-preview.component.html',
   styleUrls: ['./item-preview.component.scss']
@@ -48,6 +51,7 @@ export class ItemPreviewComponent implements OnInit {
     private route: ActivatedRoute,
     private router: Router,
     private apiService: ApiService,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
diff --git a/src/app/pages/items-list/items-list.component.html b/src/app/pages/items-list/items-list.component.html
index 0166a18..2c06c41 100644
--- a/src/app/pages/items-list/items-list.component.html
+++ b/src/app/pages/items-list/items-list.component.html
@@ -12,36 +12,36 @@
 
   <div class="filters-bar">
     <mat-form-field appearance="outline" class="search-field">
-      <mat-label>Search items</mat-label>
+      <mat-label>{{ 'SEARCH_ITEMS' | translate }}</mat-label>
       <input 
         matInput 
         [(ngModel)]="searchQuery"
         (keyup.enter)="onSearch()"
-        placeholder="Search by name...">
+        [placeholder]="'SEARCH_PLACEHOLDER' | translate">
       <button mat-icon-button matSuffix (click)="onSearch()">
         <mat-icon>search</mat-icon>
       </button>
     </mat-form-field>
 
     <mat-form-field appearance="outline" class="filter-field">
-      <mat-label>Visibility</mat-label>
+      <mat-label>{{ 'VISIBILITY' | translate }}</mat-label>
       <mat-select [(ngModel)]="visibilityFilter" (selectionChange)="onFilterChange()">
-        <mat-option [value]="undefined">All</mat-option>
-        <mat-option [value]="true">Visible</mat-option>
-        <mat-option [value]="false">Hidden</mat-option>
+        <mat-option [value]="undefined">{{ 'ALL' | translate }}</mat-option>
+        <mat-option [value]="true">{{ 'VISIBLE' | translate }}</mat-option>
+        <mat-option [value]="false">{{ 'HIDDEN' | translate }}</mat-option>
       </mat-select>
     </mat-form-field>
 
     @if (selectedItems().size > 0) {
       <div class="bulk-actions">
-        <span class="selection-count">{{ selectedItems().size }} selected</span>
+        <span class="selection-count">{{ selectedItems().size }} {{ 'SELECTED' | translate }}</span>
         <button mat-raised-button (click)="bulkToggleVisibility(true)">
           <mat-icon>visibility</mat-icon>
-          Show
+          {{ 'SHOW' | translate }}
         </button>
         <button mat-raised-button (click)="bulkToggleVisibility(false)">
           <mat-icon>visibility_off</mat-icon>
-          Hide
+          {{ 'HIDE' | translate }}
         </button>
       </div>
     }
@@ -98,11 +98,11 @@
           
           <div class="item-details">
             <span class="price">{{ item.price }} {{ item.currency }}</span>
-            <span class="quantity">Qty: {{ item.quantity }}</span>
+            <span class="quantity">{{ 'QTY' | translate }}: {{ item.quantity }}</span>
           </div>
 
           <div class="item-meta">
-            <span class="priority">Priority: {{ item.priority }}</span>
+            <span class="priority">{{ 'PRIORITY' | translate }}: {{ item.priority }}</span>
             <mat-icon [class.visible]="item.visible" [class.hidden]="!item.visible">
               {{ item.visible ? 'visibility' : 'visibility_off' }}
             </mat-icon>
@@ -126,20 +126,20 @@
   @if (loading()) {
     <div class="loading-more">
       <mat-spinner diameter="40"></mat-spinner>
-      <span>Loading more items...</span>
+      <span>{{ 'LOADING_MORE' | translate }}</span>
     </div>
   }
 
   @if (!hasMore() && items().length > 0) {
     <div class="end-message">
-      No more items to load
+      {{ 'NO_MORE_ITEMS' | translate }}
     </div>
   }
 
   @if (!loading() && items().length === 0) {
     <div class="empty-state">
       <mat-icon>inventory_2</mat-icon>
-      <p>No items found</p>
+      <p>{{ 'NO_ITEMS_FOUND' | translate }}</p>
     </div>
   }
 
diff --git a/src/app/pages/items-list/items-list.component.ts b/src/app/pages/items-list/items-list.component.ts
index b75cf84..9ff9602 100644
--- a/src/app/pages/items-list/items-list.component.ts
+++ b/src/app/pages/items-list/items-list.component.ts
@@ -17,6 +17,8 @@ import { ApiService } from '../../services';
 import { Item } from '../../models';
 import { CreateDialogComponent } from '../../components/create-dialog/create-dialog.component';
 import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-dialog.component';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 @Component({
   selector: 'app-items-list',
@@ -34,7 +36,8 @@ import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-
     MatSelectModule,
     MatToolbarModule,
     MatSnackBarModule,
-    MatDialogModule
+    MatDialogModule,
+    TranslatePipe
   ],
   templateUrl: './items-list.component.html',
   styleUrls: ['./items-list.component.scss']
@@ -60,7 +63,8 @@ export class ItemsListComponent implements OnInit, AfterViewInit, OnDestroy {
     private router: Router,
     private apiService: ApiService,
     private snackBar: MatSnackBar,
-    private dialog: MatDialog
+    private dialog: MatDialog,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
diff --git a/src/app/pages/project-view/project-view.component.html b/src/app/pages/project-view/project-view.component.html
index c5b99b9..9afb00f 100644
--- a/src/app/pages/project-view/project-view.component.html
+++ b/src/app/pages/project-view/project-view.component.html
@@ -4,13 +4,18 @@
       <mat-icon>arrow_back</mat-icon>
     </button>
     <span>{{ project()?.displayName || projectId() }}</span>
+    <span style="flex: 1"></span>
+    <div class="lang-toggle">
+      <button [class.active]="lang.currentLang() === 'en'" (click)="lang.setLang('en')">EN</button>
+      <button [class.active]="lang.currentLang() === 'ru'" (click)="lang.setLang('ru')">RU</button>
+    </div>
   </mat-toolbar>
 
   <mat-sidenav-container class="sidenav-container">
     <mat-sidenav mode="side" opened class="categories-sidebar">
       <div class="sidebar-header">
-        <h2>Categories</h2>
-        <button mat-mini-fab color="primary" (click)="addCategory()" matTooltip="Add Category">
+        <h2>{{ 'CATEGORIES' | translate }}</h2>
+        <button mat-mini-fab color="primary" (click)="addCategory()" [matTooltip]="'ADD_CATEGORY' | translate">
           <mat-icon>add</mat-icon>
         </button>
       </div>
@@ -39,7 +44,7 @@
                   <button 
                     mat-icon-button 
                     (click)="addSubcategory(node, $event)"
-                    matTooltip="Add Subcategory"
+                    [matTooltip]="'ADD_SUBCATEGORY' | translate"
                     color="accent">
                     <mat-icon>add</mat-icon>
                   </button>
@@ -48,14 +53,14 @@
                     [checked]="node.visible"
                     (change)="toggleVisibility(node, $event)"
                     color="primary"
-                    matTooltip="Toggle Visibility">
+                    [matTooltip]="'TOGGLE_VISIBILITY' | translate">
                   </mat-slide-toggle>
                   
-                  <button mat-icon-button (click)="editNode(node, $event)" color="primary" matTooltip="Edit">
+                  <button mat-icon-button (click)="editNode(node, $event)" color="primary" [matTooltip]="'EDIT' | translate">
                     <mat-icon>edit</mat-icon>
                   </button>
                   
-                  <button mat-icon-button (click)="deleteCategory(node, $event)" color="warn" matTooltip="Delete">
+                  <button mat-icon-button (click)="deleteCategory(node, $event)" color="warn" [matTooltip]="'DELETE' | translate">
                     <mat-icon>delete</mat-icon>
                   </button>
                 </div>
@@ -77,8 +82,8 @@
         @if (!hasActiveRoute()) {
           <div class="welcome-message">
             <mat-icon style="font-size: 64px; width: 64px; height: 64px; color: #1976d2;">dashboard</mat-icon>
-            <h2>Welcome to {{ project()?.displayName || 'Project' }} Backoffice</h2>
-            <p>Select a category or subcategory from the sidebar to start editing.</p>
+            <h2>{{ 'WELCOME_TO' | translate }} {{ project()?.displayName || 'Project' }} {{ 'BACKOFFICE' | translate }}</h2>
+            <p>{{ 'SELECT_FROM_SIDEBAR' | translate }}</p>
           </div>
         }
       </div>
@@ -109,7 +114,7 @@
               <button 
                 mat-icon-button 
                 (click)="addSubcategory(subNode, $event)"
-                matTooltip="Add Subcategory"
+                [matTooltip]="'ADD_SUBCATEGORY' | translate"
                 color="accent">
                 <mat-icon>add</mat-icon>
               </button>
@@ -119,7 +124,7 @@
               <button 
                 mat-icon-button 
                 (click)="viewItems(subNode, $event)"
-                matTooltip="View Items">
+                [matTooltip]="'VIEW_ITEMS' | translate">
                 <mat-icon>list</mat-icon>
               </button>
             }
@@ -128,14 +133,14 @@
               [checked]="subNode.visible"
               (change)="toggleVisibility(subNode, $event)"
               color="primary"
-              matTooltip="Toggle Visibility">
+              [matTooltip]="'TOGGLE_VISIBILITY' | translate">
             </mat-slide-toggle>
             
-            <button mat-icon-button (click)="editNode(subNode, $event)" color="primary" matTooltip="Edit">
+            <button mat-icon-button (click)="editNode(subNode, $event)" color="primary" [matTooltip]="'EDIT' | translate">
               <mat-icon>edit</mat-icon>
             </button>
             
-            <button mat-icon-button (click)="deleteSubcategory(subNode, $event)" color="warn" matTooltip="Delete">
+            <button mat-icon-button (click)="deleteSubcategory(subNode, $event)" color="warn" [matTooltip]="'DELETE' | translate">
               <mat-icon>delete</mat-icon>
             </button>
           </div>
diff --git a/src/app/pages/project-view/project-view.component.scss b/src/app/pages/project-view/project-view.component.scss
index f7980ce..5a49f1d 100644
--- a/src/app/pages/project-view/project-view.component.scss
+++ b/src/app/pages/project-view/project-view.component.scss
@@ -4,6 +4,41 @@
   flex-direction: column;
 }
 
+// Language toggle in toolbar
+.lang-toggle {
+  display: flex;
+  border: 1px solid rgba(255, 255, 255, 0.35);
+  border-radius: 4px;
+  overflow: hidden;
+
+  button {
+    background: transparent;
+    border: none;
+    border-left: 1px solid rgba(255, 255, 255, 0.2);
+    color: rgba(255, 255, 255, 0.65);
+    padding: 4px 10px;
+    cursor: pointer;
+    font-size: 0.78rem;
+    font-weight: 700;
+    letter-spacing: 0.04em;
+    line-height: 24px;
+    transition: background 0.15s;
+
+    &:first-child {
+      border-left: none;
+    }
+
+    &.active {
+      background: rgba(255, 255, 255, 0.2);
+      color: #fff;
+    }
+
+    &:hover:not(.active) {
+      background: rgba(255, 255, 255, 0.08);
+    }
+  }
+}
+
 .sidenav-container {
   flex: 1;
   height: calc(100vh - 64px);
diff --git a/src/app/pages/project-view/project-view.component.ts b/src/app/pages/project-view/project-view.component.ts
index 9a4667b..d878c49 100644
--- a/src/app/pages/project-view/project-view.component.ts
+++ b/src/app/pages/project-view/project-view.component.ts
@@ -18,6 +18,8 @@ import { CreateDialogComponent } from '../../components/create-dialog/create-dia
 import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-dialog.component';
 import { LoadingSkeletonComponent } from '../../components/loading-skeleton/loading-skeleton.component';
 import { MatTooltipModule } from '@angular/material/tooltip';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 interface CategoryNode {
   id: string;
@@ -47,7 +49,8 @@ interface CategoryNode {
     MatDialogModule,
     MatSnackBarModule,
     MatTooltipModule,
-    LoadingSkeletonComponent
+    LoadingSkeletonComponent,
+    TranslatePipe
   ],
   templateUrl: './project-view.component.html',
   styleUrls: ['./project-view.component.scss']
@@ -66,7 +69,8 @@ export class ProjectViewComponent implements OnInit {
     private apiService: ApiService,
     private dialog: MatDialog,
     private snackBar: MatSnackBar,
-    private validationService: ValidationService
+    private validationService: ValidationService,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
diff --git a/src/app/pages/projects-dashboard/projects-dashboard.component.html b/src/app/pages/projects-dashboard/projects-dashboard.component.html
index 00581af..f14799c 100644
--- a/src/app/pages/projects-dashboard/projects-dashboard.component.html
+++ b/src/app/pages/projects-dashboard/projects-dashboard.component.html
@@ -1,5 +1,5 @@
 <div class="dashboard-container">
-  <h1>Marketplace Backoffice</h1>
+  <h1>{{ 'MARKETPLACE_BACKOFFICE' | translate }}</h1>
   
   @if (loading()) {
     <div class="loading-container">
@@ -25,7 +25,7 @@
           </mat-card-header>
           <mat-card-content>
             <div class="project-status" [class.active]="project.active">
-              {{ project.active ? 'Active' : 'Inactive' }}
+              {{ project.active ? ('ACTIVE' | translate) : ('INACTIVE' | translate) }}
             </div>
           </mat-card-content>
         </mat-card>
diff --git a/src/app/pages/projects-dashboard/projects-dashboard.component.ts b/src/app/pages/projects-dashboard/projects-dashboard.component.ts
index e9ecaa6..18d3908 100644
--- a/src/app/pages/projects-dashboard/projects-dashboard.component.ts
+++ b/src/app/pages/projects-dashboard/projects-dashboard.component.ts
@@ -5,11 +5,13 @@ import { MatCardModule } from '@angular/material/card';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 import { ApiService } from '../../services';
 import { Project } from '../../models';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 @Component({
   selector: 'app-projects-dashboard',
   standalone: true,
-  imports: [CommonModule, MatCardModule, MatProgressSpinnerModule],
+  imports: [CommonModule, MatCardModule, MatProgressSpinnerModule, TranslatePipe],
   templateUrl: './projects-dashboard.component.html',
   styleUrls: ['./projects-dashboard.component.scss']
 })
@@ -21,7 +23,8 @@ export class ProjectsDashboardComponent implements OnInit {
 
   constructor(
     private apiService: ApiService,
-    private router: Router
+    private router: Router,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
diff --git a/src/app/pages/subcategory-editor/subcategory-editor.component.html b/src/app/pages/subcategory-editor/subcategory-editor.component.html
index 467efb6..1f7e543 100644
--- a/src/app/pages/subcategory-editor/subcategory-editor.component.html
+++ b/src/app/pages/subcategory-editor/subcategory-editor.component.html
@@ -7,13 +7,13 @@
         <button mat-icon-button (click)="goBack()">
           <mat-icon>close</mat-icon>
         </button>
-        <h2>Edit Subcategory</h2>
+        <h2>{{ 'EDIT_SUBCATEGORY' | translate }}</h2>
       </div>
       <div style="display: flex; align-items: center; gap: 12px;">
         @if (saving()) {
-          <span class="save-indicator">Saving...</span>
+          <span class="save-indicator">{{ 'SAVING' | translate }}</span>
         }
-        <button mat-icon-button color="warn" (click)="deleteSubcategory()" matTooltip="Delete Subcategory">
+        <button mat-icon-button color="warn" (click)="deleteSubcategory()" [matTooltip]="'DELETE_SUBCATEGORY' | translate">
           <mat-icon>delete</mat-icon>
         </button>
       </div>
@@ -21,14 +21,14 @@
 
     <div class="editor-content">
       <mat-form-field appearance="outline" class="full-width">
-        <mat-label>Name</mat-label>
-        <input 
-          matInput 
+        <mat-label>{{ 'NAME' | translate }}</mat-label>
+        <input
+          matInput
           [(ngModel)]="subcategory()!.name"
           (blur)="onFieldChange('name', subcategory()!.name)"
           required>
         @if (!subcategory()!.name || subcategory()!.name.trim().length === 0) {
-          <mat-error>Subcategory name is required</mat-error>
+          <mat-error>{{ 'NAME' | translate }}</mat-error>
         }
       </mat-form-field>
 
@@ -39,7 +39,7 @@
           [(ngModel)]="subcategory()!.id"
           (blur)="onFieldChange('id', subcategory()!.id)"
           required>
-        <mat-hint>Used for routing - update carefully</mat-hint>
+        <mat-hint>{{ 'ID' | translate }}</mat-hint>
         @if (!subcategory()!.id || subcategory()!.id.trim().length === 0) {
           <mat-error>ID is required</mat-error>
         }
@@ -50,12 +50,12 @@
           [(ngModel)]="subcategory()!.visible"
           (change)="onFieldChange('visible', subcategory()!.visible)"
           color="primary">
-          Visible
+          {{ 'VISIBLE' | translate }}
         </mat-slide-toggle>
       </div>
 
       <mat-form-field appearance="outline" class="full-width">
-        <mat-label>Priority</mat-label>
+        <mat-label>{{ 'PRIORITY' | translate }}</mat-label>
         <input 
           matInput 
           type="number"
@@ -63,14 +63,14 @@
           (blur)="onFieldChange('priority', subcategory()!.priority)"
           required
           min="0">
-        <mat-hint>Lower numbers appear first</mat-hint>
+        <mat-hint>{{ 'PRIORITY_HINT' | translate }}</mat-hint>
         @if (subcategory()!.priority < 0) {
-          <mat-error>Priority cannot be negative</mat-error>
+          <mat-error>{{ 'PRIORITY_HINT' | translate }}</mat-error>
         }
       </mat-form-field>
 
       <div class="image-section">
-        <h3>Image</h3>
+        <h3>{{ 'IMAGE' | translate }}</h3>
         
         @if (subcategory()!.img) {
           <div class="image-preview">
@@ -82,7 +82,7 @@
           <div class="upload-option">
             <label for="file-upload" class="upload-label">
               <mat-icon>upload_file</mat-icon>
-              Upload Image
+              {{ 'UPLOAD_IMAGE' | translate }}
             </label>
             <input 
               id="file-upload"
@@ -93,7 +93,7 @@
           </div>
 
           <mat-form-field appearance="outline" class="full-width">
-            <mat-label>Or enter image URL</mat-label>
+            <mat-label>{{ 'IMAGE_URL' | translate }}</mat-label>
             <input 
               matInput
               [value]="subcategory()!.img || ''"
@@ -106,15 +106,24 @@
         @if (subcategory()!.subcategories?.length) {
           <p class="no-items-note">
             <mat-icon>account_tree</mat-icon>
-            This subcategory has child subcategories — items can only be added to leaf nodes.
+            {{ 'SUBCATEGORIES' | translate }}
           </p>
         } @else {
           <button mat-raised-button color="primary" (click)="viewItems()">
             <mat-icon>{{ subcategory()!.hasItems ? 'list' : 'add' }}</mat-icon>
-            {{ subcategory()!.hasItems ? 'View Items (' + (subcategory()!.itemCount || 0) + ')' : 'Add Items' }}
+            {{ subcategory()!.hasItems ? (('VIEW_ITEMS' | translate) + ' (' + (subcategory()!.itemCount || 0) + ')') : ('ADD_SUBCATEGORY' | translate) }}
           </button>
         }
       </div>
+
+      <div class="translations-section">
+        <h3>{{ 'TRANSLATIONS' | translate }}</h3>
+        <p class="hint">{{ 'TRANSLATIONS_HINT' | translate }}</p>
+        <mat-form-field appearance="outline" class="full-width">
+          <mat-label>{{ 'NAME_TRANSLATED' | translate }}</mat-label>
+          <input matInput [(ngModel)]="ruName" (blur)="saveRuName(ruName)" [placeholder]="'NAME_TRANSLATED' | translate">
+        </mat-form-field>
+      </div>
     </div>
   }
 </div>
diff --git a/src/app/pages/subcategory-editor/subcategory-editor.component.ts b/src/app/pages/subcategory-editor/subcategory-editor.component.ts
index 9b92066..315f40f 100644
--- a/src/app/pages/subcategory-editor/subcategory-editor.component.ts
+++ b/src/app/pages/subcategory-editor/subcategory-editor.component.ts
@@ -9,11 +9,14 @@ import { MatSlideToggleModule } from '@angular/material/slide-toggle';
 import { MatIconModule } from '@angular/material/icon';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 import { MatSnackBar, MatSnackBarModule } from '@angular/material/snack-bar';
+import { MatTooltipModule } from '@angular/material/tooltip';
 import { MatDialog, MatDialogModule } from '@angular/material/dialog';
 import { ApiService } from '../../services';
 import { Subcategory } from '../../models';
 import { LoadingSkeletonComponent } from '../../components/loading-skeleton/loading-skeleton.component';
 import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-dialog.component';
+import { LanguageService } from '../../services/language.service';
+import { TranslatePipe } from '../../pipes/translate.pipe';
 
 @Component({
   selector: 'app-subcategory-editor',
@@ -29,7 +32,9 @@ import { ConfirmDialogComponent } from '../../components/confirm-dialog/confirm-
     MatProgressSpinnerModule,
     MatSnackBarModule,
     MatDialogModule,
-    LoadingSkeletonComponent
+    MatTooltipModule,
+    LoadingSkeletonComponent,
+    TranslatePipe
   ],
   templateUrl: './subcategory-editor.component.html',
   styleUrls: ['./subcategory-editor.component.scss']
@@ -41,12 +46,16 @@ export class SubcategoryEditorComponent implements OnInit {
   subcategoryId = signal<string>('');
   projectId = signal<string>('');
 
+  /** Local buffer for the Russian translation of the subcategory name */
+  ruName = '';
+
   constructor(
     private route: ActivatedRoute,
     private router: Router,
     private apiService: ApiService,
     private snackBar: MatSnackBar,
-    private dialog: MatDialog
+    private dialog: MatDialog,
+    public lang: LanguageService
   ) {}
 
   ngOnInit() {
@@ -67,6 +76,7 @@ export class SubcategoryEditorComponent implements OnInit {
     this.apiService.getSubcategory(this.subcategoryId()).subscribe({
       next: (subcategory) => {
         this.subcategory.set(subcategory);
+        this.ruName = subcategory.translations?.['ru']?.name || '';
         this.loading.set(false);
       },
       error: (err) => {
@@ -77,6 +87,14 @@ export class SubcategoryEditorComponent implements OnInit {
     });
   }
 
+  saveRuName(value: string) {
+    const sub = this.subcategory();
+    if (!sub) return;
+    sub.translations = sub.translations || {};
+    sub.translations['ru'] = { ...(sub.translations['ru'] || {}), name: value };
+    this.onFieldChange('translations' as any, sub.translations);
+  }
+
   onFieldChange(field: keyof Subcategory, value: any) {
     this.saving.set(true);
     this.apiService.queueSave('subcategory', this.subcategoryId(), field, value);
diff --git a/src/app/pipes/translate.pipe.ts b/src/app/pipes/translate.pipe.ts
new file mode 100644
index 0000000..bf9fdb1
--- /dev/null
+++ b/src/app/pipes/translate.pipe.ts
@@ -0,0 +1,21 @@
+import { Pipe, PipeTransform, inject } from '@angular/core';
+import { LanguageService } from '../services/language.service';
+
+/**
+ * Pure:false pipe so it re-evaluates on every change detection cycle,
+ * which fires whenever the currentLang signal changes (triggered by the toggle click).
+ *
+ * Usage: {{ 'CATEGORIES' | translate }}
+ */
+@Pipe({
+  name: 'translate',
+  standalone: true,
+  pure: false,
+})
+export class TranslatePipe implements PipeTransform {
+  private lang = inject(LanguageService);
+
+  transform(key: string): string {
+    return this.lang.t(key);
+  }
+}
diff --git a/src/app/services/language.service.ts b/src/app/services/language.service.ts
new file mode 100644
index 0000000..850bde3
--- /dev/null
+++ b/src/app/services/language.service.ts
@@ -0,0 +1,34 @@
+import { Injectable, signal } from '@angular/core';
+import { TRANSLATIONS } from '../i18n/translations';
+
+export type SupportedLang = 'en' | 'ru';
+
+export const SUPPORTED_LANGS: { code: SupportedLang; label: string }[] = [
+  { code: 'en', label: 'EN' },
+  { code: 'ru', label: 'RU' },
+];
+
+// All UI strings live in src/app/i18n/translations.ts
+
+@Injectable({ providedIn: 'root' })
+export class LanguageService {
+  currentLang = signal<SupportedLang>('ru');
+
+  toggle() {
+    this.currentLang.set(this.currentLang() === 'en' ? 'ru' : 'en');
+  }
+
+  setLang(lang: SupportedLang) {
+    this.currentLang.set(lang);
+  }
+
+  t(key: string): string {
+    const lang = this.currentLang();
+    return TRANSLATIONS[lang]?.[key] ?? TRANSLATIONS['en']?.[key] ?? key;
+  }
+
+  /** Returns the secondary content language (the one to translate INTO). */
+  get contentTranslationLang(): SupportedLang {
+    return this.currentLang() === 'en' ? 'ru' : 'en';
+  }
+}