Get Google Translate code OR GTranslate (free) working on my non-profit Joomla 3.9 website.

Have upgraded Joomla site and previously had a custom module (widget) code from google which created a drop down of chosen languages which users could select and immediately see the website translated.

Since upgrade to joomla 3.9 the custom module code no longer works.
Is there a free google translate code/widget that can easily be used for non-profit websites? If Yes - then Can you do this?
OR
If the only way is to create a Google Cloud Translation API, credentials, billing and create the code again then can you do this ?
OR
GTranslate offer a free Joomla Extension BUT this is clashing with mootools library on my site - Can you sort this?


OLD Code - which no longer works:
<div id="google_translate_element"></div><script>
function googleTranslateElementInit() {
new google.translate.TranslateElement({
pageLanguage: 'en',
includedLanguages: 'da,nl,fr,de,is,no,ru,es,sv',
layout: google.translate.TranslateElement.InlineLayout.HORIZONTAL
}, 'google_translate_element');
}
</script><script src="//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit"></script>