Live Presentation Translation: Translate a presenters speech into 60 languages and enable users to follow live translations in the language of their choosing on their device. alotaiba/googletext2speech.md.Google now requires an API Key to use Google Translate on your website and charges 20 USD per million characters. Question: Where do you add the key within the above URL in order not to get a 404 message from Google. Google Translate includes the text-to-speech functionality that converts text into voice. The text-to-speech service is available for 30 languages. You can listen to the original text or its translation. I explained a bit more here: HTML5 speech input and Google Translate text -to-speech, problem in Chrome.