<div id="google_translate_element"></div>
<script type="text/javascript">
  function googleTranslateElementInit() {
    new google.translate.TranslateElement({
      pageLanguage: 'pt',
      includedLanguages: 'en',
      layout: google.translate.TranslateElement.InlineLayout.SIMPLE
    }, 'google_translate_element');
  }

  (function() {
    var gtScript = document.createElement('script');
    gtScript.src = 'https://translate.google.com/translate_a/element.js?cb=googleTranslateElementInit';
    document.body.appendChild(gtScript);
  })();
</script>