Google Translate

https://help.shopify.com/manual/sell-online/online-store/translate-theme#add-a-google-translate-widget-to-your-website

<div id="google_translate_element"></div><script type="text/javascript">

function googleTranslateElementInit() {

  new google.translate.TranslateElement({pageLanguage: 'en', layout: google.translate.TranslateElement.InlineLayout.SIMPLE}, 'google_translate_element');

}

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