smoothschedule/frontend/src/i18n/index.ts

/**
 * i18n Configuration
 * Internationalization setup using react-i18next
 */

import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import LanguageDetector from 'i18next-browser-languagedetector';

// Import translation files
import en from './locales/en.json';
import es from './locales/es.json';
import fr from './locales/fr.json';
import de from './locales/de.json';

export const supportedLanguages = [
  { code: 'en', name: 'English', flag: '🇺🇸' },
  { code: 'es', name: 'Español', flag: '🇪🇸' },
  { code: 'fr', name: 'Français', flag: '🇫🇷' },
  { code: 'de', name: 'Deutsch', flag: '🇩🇪' },
] as const;

export type SupportedLanguage = typeof supportedLanguages[number]['code'];

const resources = {
  en: { translation: en },
  es: { translation: es },
  fr: { translation: fr },
  de: { translation: de },
};

i18n
  .use(LanguageDetector)
  .use(initReactI18next)
  .init({
    resources,
    fallbackLng: 'en',
    debug: false, // Disable debug logging

    interpolation: {
      escapeValue: false, // React already escapes values
    },

    detection: {
      // Order of language detection
      order: ['localStorage', 'navigator', 'htmlTag'],
      // Cache user language preference
      caches: ['localStorage'],
      lookupLocalStorage: 'smoothschedule_language',
    },
  });

export default i18n;