application-amicale/src/managers/LocaleManager.js

// @flow

import i18n from 'i18n-js';
import * as RNLocalize from 'react-native-localize';

import en from '../../locales/en.json';
import fr from '../../locales/fr.json';

/**
 * Static class used to manage locales
 */
export default class LocaleManager {
  /**
   * Initialize translations using language files
   */
  static initTranslations() {
    i18n.fallbacks = true;
    i18n.translations = {fr, en};
    i18n.locale = RNLocalize.findBestAvailableLanguage([
      'en',
      'fr',
    ]).languageTag;
  }
}