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Duolingo

Duolingo, Inc.is an American educational technology company that produces learning apps and provides language certification. Duolingo offers courses on 42 languages, ranging from English, French, and Spanish to less commonly studied languages such as Welsh, Irish, and Navajo, and even constructed languages such as Klingon.

It also offers courses on music, math, and chess. The learning method incorporates gamification to motivate users with points, rewards and interactive lessons featuring spaced repetition. The app promotes short, daily lessons for consistent, phased practice.

Duolingo also offers the Duolingo English Test, an online language assessment, and Duolingo ABC, a literacy app designed for children. The company follows a freemium model, where some content is provided for free with advertising, and users can pay for ad-free services which provide additional features.

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