React example of app library initialization

i18n.ts

import i18NextLib from 'i18next';
import {initReactI18next} from 'react-i18next'; //To have a react context
import {resources} from 'dictionary-package/lib/bundles/app-1'; //reduce bundles if there is many 
import {defaultInterpolation} from 'dictionary-package/lib/lib/helpers'; // day-to-day functions to format text

const i18next = i18NextLib.createInstance();

i18next.use(initReactI18next).init({
  lng: 'en',
  resources,
  fallbackLng: 'en',
  saveMissing: true,
  interpolation: defaultInterpolation,//Learn more at i18n docs
  parseMissingKeyHandler: (key: string) => {
    const message = `MISSING TRANSLATION for key: "${key}"`;
    //Can be logger with alert if you forgot something
    console.warn(message);
    //Placeholder for missing key
    return `⛔️`;
  },
});

export {i18next};
export default i18next;