Most of Duolingo’s A.I. costs are tied to an OpenAI -powered video call feature introduced last year, CEO Luis von Ahn told ...

Duo the Owl, Duolingo's make-believe mascot, is alive. The language-learning app announced on Monday that the mascot had faked his death. Duolingo announced two weeks ago that the mascot was ...

"Please post any leads on Twitter."The company said in lieu of flowers, people should complete a Duolingo lesson on the app in the owl’s honor.Duolingo, with headquarters on Penn Avenue in ...