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Duolingo’s crowdsourced language-learning model is letting some weird things slip through the cracks

Michael J. Coren
Duolingo’s crowdsourced language-learning model is letting some weird things slip through the cracks

Duolingo has pulled off a remarkable feat. The startup, valued at $700 million, has built one of the world’s most popular language learning apps while only hiring a handful of translators. Each day, the startup serves up millions of sentences, almost all of them created by its 300 or so volunteers. The seven-year-old company achieved…