State of Duolingo • Luis von Ahn • Duocon 2020
9:58
La FOLLE histoire de Duolingo racontée par son fondateur 🦉
24:12
I did Duolingo for 2000 days. Can I speak Spanish?
16:40
Massive-scale online collaboration | Luis von Ahn
15:42
How I Built A $6.5 Billion App Called Duolingo | Founder Effect
26:48
Duolingo Learning Assessment • Joseph Rollinson • Duocon 2020
1:55:27
Worst Fails of the Year | Try Not to Laugh 💩
27:04
Duolingo is (almost) good now
15:16