利用google的API做到中英文切换

<div id="google_translate_element"></div>
<script>
function googleTranslateElementInit() {
  new google.translate.TranslateElement({
    pageLanguage: 'zh-CN',
    includedLanguages: 'en,zh-TW'
  }, 'google_translate_element');
}
</script><script src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>