Duolingo: Game of tongues
Duolingo has built a $700 million business with an addictive app that claims to teach Spanish, French, Chinese and even High Valyrian
By Susan Adams
Sep 02, 2019, 10:00 IST11 min

Image by Forbes
2/4
Image by Forbes
3/4
Image by Forbes
4/4
Image by Forbes
Photogallery
- Home /
- Photogallery /
- Cross-border /
- Duolingo-game-of-tongues
Advertisement
Advertisement