let $i18n = {
      en: {
          '注冊': 'Register',
          '交易': 'Exchange',
          '回款': 'Rewards',
          '平臺': 'App',
          '網(wǎng)址': 'Link'
      }
}

let $tt = function (value) {

    let translation;
    try {
        translation = $i18n[locale][value];
    } finally {
        return translation || value;
    }

}

this.state = {
    locale: 'en', 
    localeName: '英文'
}

<img src={`/img/banner_01_${locale}.png`} />
<div>{$tt(`注冊`)}</div>