how to do localisation in react native code example

Example: react-native app localisation

import memoize from 'lodash.memoize'; // Use for caching/memoize for better performanceimport i18n from 'i18n-js';import * as Localization from 'expo-localization';import { I18nManager } from 'react-native';export const translationGetters = {  'es-US': () => require('./es.json'),  'en-US': () => require('./en.json'),  'fr-FR': () => require('./fr.json'),};export const IMLocalized = memoize(  (key, config) =>    i18n.t(key, config).includes('missing') ? key : i18n.t(key, config),  (key, config) => (config ? key + JSON.stringify(config) : key),);export const init = () => {      let localeLanguageTag = Localization.locale;  let isRTL = Localization.isRTL;  IMLocalized.cache.clear();  // update layout direction  I18nManager.forceRTL(isRTL);  // set i18n-js config  i18n.translations = {    [localeLanguageTag]: translationGetters[localeLanguageTag](),  };  i18n.locale = localeLanguageTag;};