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now duolingo teaches the world's five most common languages

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duolingo's klingon course has finally arrived

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duolingo adds mandarin course to its language library

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duolingo’s ‘game of thrones’ language course is almost ready

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duolingo has a premium subscription, but lessons are still free

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all the terrible april fools pranks brands want you to laugh at this year

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duolingo and wolfram alpha arrive for windows phone

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google brings evernote, vine, and other android apps to chromebooks

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how duolingo uses a/b testing to understand the way you learn

language learning

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duolingo raises $20 million, will offer more languages and a certification program

kleiner perkins caufield & byers

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buzzfeed teams up with duolingo for global expansion

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five free online tools to learn another language

internet polyglot

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