What is the incentive for unpaid volunteers to add new languages to Duolingo?
This is actually a very good question. We all certainly hope that people will want to add languages to duolingo , but it is going to be very insightful to see how that actually works. Until now I have basically just assumed it will work out, and though I have no doubt it will, I think that it will be a pretty large paradigm shift for duolingo. The whole thing has basically been handed out on a plate so far.