General info about this app.
Duolingo is the #1 way to learn languages online. It’s fun because it feels like you’re playing a game while learning. It’s also effective—34 hours of Duolingo are equivalent to a university semester of language instruction. But best of all, it’s 100% free. On Glass, you can conveniently practice your Spanish, French, German, Portuguese, or Italian vocabulary using hands-free flashcards.