Fascinating. I had only ever used the SMS version so that the whole thing was really centered around collecting voice samples is a double surprise to me.
Why would you want to collect training data from English learners?
Because a lot of English is spoken by non-native speakers.
True. The exact ratio is three non-native speakers to one native speaker.
Improved transcription accuracy from non-native English I bet.
This doesn't make any sense.
Youtube has trillions of hours of audio