Duolingo
Duolingo is an American company that runs the language-learning app of the same name.
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Last mentioned Duolingo was founded in Pittsburgh by Luis von Ahn and Severin Hacker, and its headquarters remains in Pittsburgh. Its language-learning app, built around short exercises, is offered free and through paid subscriptions.
The app features characters such as Duo, a green owl, and is known for game-like elements, such as daily streaks and leaderboards, that keep learners coming back.
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