feature/add more languages

README.md

@@ -68,7 +68,7 @@ Open **http://localhost:8001** and create your account.
 - **Cover art from multiple sources.** Automatic search across AbeBooks, Open Library, Amazon, and Hardcover — plus manual upload or URL paste.
 - **Full REST API.** OpenAPI-documented backend you can script against — build your own frontend, connect home automation, or pipe data into your own tools.
 - **Lightweight.** Two Docker containers, one SQLite database.
-- **Bilingual UI.** English and German with a localization framework ready for more languages.
+- **Multi-language UI.** English, German, Spanish, French, and Chinese (Simplified) — with a localization framework ready for more languages.
 
 ---
 

docs/about.md

@@ -11,7 +11,7 @@ LibrisLog is a **multi-user book tracking web application** designed for readers
 - **Cover Management**: Automatic cover image scraping from multiple sources with manual override
 - **Data Portability**: Export/import library as JSON or CSV. Full backup and restore functionality
 - **REST API**: Full API with OpenAPI documentation for programmatic access
-- **Multilingual**: English and German UI support
+- **Multilingual**: English, German, Spanish, French, and Chinese (Simplified) UI support
 - **Themes**: Light, dark, and custom DaisyUI themes with persistent preferences
 
 ## Technology Stack

docs/guide/configuration.md

@@ -58,7 +58,7 @@ All configuration is done via environment variables in a `.env` file at the proj
 
 | Variable | Description | Default |
 |----------|-------------|---------|
-| `PUBLIC_DEFAULT_LOCALE` | Default UI language (`en` or `de`) | `en` |
+| `PUBLIC_DEFAULT_LOCALE` | Default UI language (`en`, `de`, `zh`, `es`, or `fr`) | `en` |
 
 ## Import Limits
 

docs/guide/developer-setup.md

@@ -20,7 +20,7 @@ When building, you can override these arguments:
 |----------|-------------|---------|
 | `APP_VERSION` | Application version string | `v0.0.0-dev` |
 | `GIT_SHA` | Git commit hash for version display | `unknown` |
-| `PUBLIC_DEFAULT_LOCALE` | Default UI language (`en` or `de`) | `en` |
+| `PUBLIC_DEFAULT_LOCALE` | Default UI language (`en`, `de`, `zh`, `es`, or `fr`) | `en` |
 
 Example:
 

frontend/src/lib/i18n/index.ts

@@ -1,7 +1,7 @@
 import { addMessages, init, locale, register, waitLocale, _ } from 'svelte-i18n';
 import { api } from '$lib/api';
 
-export const SUPPORTED_LOCALES = ['en', 'de'] as const;
+export const SUPPORTED_LOCALES = ['en', 'de', 'zh', 'es', 'fr'] as const;
 export type AppLocale = (typeof SUPPORTED_LOCALES)[number];
 
 const DEFAULT_LOCALE: AppLocale = 'en';
@@ -12,6 +12,9 @@ const configuredDefaultLocale: AppLocale = isSupportedLocale(envLocale) ? envLoc
 
 register('en', () => import('./locales/en.json'));
 register('de', () => import('./locales/de.json'));
+register('zh', () => import('./locales/zh.json'));
+register('es', () => import('./locales/es.json'));
+register('fr', () => import('./locales/fr.json'));
 
 addMessages('en', {});
 

frontend/src/lib/i18n/locales/de.json

@@ -278,7 +278,10 @@
   },
   "languages": {
     "en": "Englisch",
-    "de": "Deutsch"
+    "de": "Deutsch",
+    "zh": "Chinesisch",
+    "es": "Spanisch",
+    "fr": "Französisch"
   },
   "auth": {
     "login": "Anmelden",

frontend/src/lib/i18n/locales/en.json

@@ -278,7 +278,10 @@
   },
   "languages": {
     "en": "English",
-    "de": "German"
+    "de": "German",
+    "zh": "Chinese",
+    "es": "Spanish",
+    "fr": "French"
   },
   "auth": {
     "login": "Login",