UPDATE: Live translation (went bad)
Please, do NOT buy MacWhisper if you will only use the live subtitles! The quality is so poor that it shows that the professor is talking about a kitchen when he's actually talking about vector geometry.
MacWhisper seems like a good app, but not for that feature. I asked for a refund by email two days ago, but no one has replied. I'm a student, and I'm pissed because I can't spend that much money on an app that I will not use :/