Counterpart是一个翻译和本地化库，用于Node.js和浏览器。示例代码：translate.registerTranslations('de', require('counterpart/locales/de'));translate.registerTranslations('de', require('./locales/de.json'));translate('foo', { locale: 'de' });translate.getLocale()     // => 'en'translate.setLocale('de') // => 'en' (re