app.js fragment

app.js

  i18next
    .use(Backend)
    .use(i18nextMiddleware.LanguageDetector)
    .init({
      backend: {
        loadPath: __dirname + '/locales/{{lng}}/{{ns}}.json',
      },
      detection: {
        order: ['querystring', 'cookie'],
        caches: ['cookie']
      },
      fallbackLng: 'en',
      preload: ['en', 'ru']
    });