First of all, great work on adding this service — I have noticed significant improvements! It would be great if you could also add the ability to play audio for the input language. This is important because, for people like me who are learning a new language, it helps us type the words and listen to the pronunciation as well. This is something that the Google Translate and Apple Translate apps already offer.
I expect to be able to listen to the input language words/sentences once the translation is complete.