Add Google Translate to Your Blog

1. Go to Design,  Page Elements and Add a Gadget
2. Select HTML/JavaScript 
3. Fill : Title with Translate and Content copy script this below.
              

<div id="google_translate_element"></div><script>

function googleTranslateElementInit() {

  new google.translate.TranslateElement({

    pageLanguage: 'en'

  }, 'google_translate_element');

}

</script><script src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>

4. Save