For my game, I need text-to-speech. Since it's Android, I decided to settle for MP3s, since the range of words spoken is few.

For my prototype, I'm using Google Translate to generate the audio since it has awesome pronounciation across multiple languages.

But can I use it in production? What if I sell my game for $1 on the app store?

All I can find on SE is that the API may be LGPL, and that the licensing page mentions the API is only available for academic research -- nothing more. My usage is a bit different; I'm actually capturing the audio bits and using those instead.

I'm curious to know the license for this; I can't find anything with my Google-fu.