namae/web/src/i18n.js

import i18n from 'i18next'
import Backend from 'i18next-chained-backend'
import LocalStorageBackend from 'i18next-localstorage-backend'
import XHR from 'i18next-xhr-backend'
import LanguageDetector from 'i18next-browser-languagedetector'
import { initReactI18next } from 'react-i18next'

i18n
  .use(Backend)
  .use(LanguageDetector)
  .use(initReactI18next)
  .init({
    backend: {
      backends: [LocalStorageBackend, XHR],
      backendOptions: [],
    },
    fallbackLng: 'en',
    debug: false,
    interpolation: {
      escapeValue: false, // not needed for react as it escapes by default
    },
  })

export default i18n