Duolingo adds Mandarin course to its language library
November 16, 2017
Online language learning company Duolingo has finally added a Mandarin course to its offerings. With more than one billion speakers, Mandarin is the most popular language on the planet, but it's also on one of the hardest to learn, which is why the c…
Source: Engadget | Duolingo adds Mandarin course to its language library
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