taro/src/context/locales/index.ts

import Taro from '@tarojs/taro';
import LanguageDetector from 'i18next-browser-languagedetector';
import i18n from 'i18next';
import zh from './zh'
import en from './en'
import { initReactI18next } from 'react-i18next';

function getLanguageSetting() {
  if (process.env.TARO_ENV == 'weapp') {
    var key = Taro.getStorageSync('language')
    if (key) {
      initLocale(key)
    }
    else {
      initLocale('zh')
    }
  }
  else {
    initLocale('en')
  }
}

function initLocale(strLocale: string) {
  i18n.use(LanguageDetector) //嗅探当前浏览器语言
    .use(initReactI18next) //init i18next
    .init({
      //引入资源文件
      resources: {
        en: {
          translation: en,
        },
        zh: {
          translation: zh,
        },
      },
      //选择默认语言，选择内容为上述配置中的key，即en/zh
      lng: strLocale,//Taro.getStorageSync('language') ? Taro.getStorageSync('language') : 'en',
      debug: false,
      interpolation: {
        escapeValue: false, // not needed for react as it escapes by default
      },
    })
}

getLanguageSetting();
export default i18n;