When (if ever) is the Duolingo team planning on adding audio to the Vietnamese courses? I feel it would be useless for me to learn how to read Vietnamese if I can't speak it with my many Vietnamese friends.
I agree that the lack of audio is a major deterrent. I make frequent and heavy use of the audio in DuoLingo courses and it's much harder to learn a course that has only partial audio.
One thing you can do is to use a supplementary TTS system. Google Translate can speak words out loud, so you can copy and paste things into there if you open it in a separate window...it's a little more work, but you can at least hear the stuff, and with time you can use keyboard shortcuts to make switching between it and the DuoLingo lesson quick and easy.
There are also built-in TTS extensions although I haven't gotten one working for Vietnamese yet...but there may be one out there that I don't know about.
What is the status if any on improving the audio on the Vietnamese course. It doesn't have notes on the background like in German and French or audio on each word or sentence. There are also some strange sentences like "The bat is at the train station." which I will never actually say. Anyone have any feedback on this?