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- Duolingo explained by Luis .
Duolingo explained by Luis .
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nice to see what the CEO said and how much has now changed
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http://jackelliot.over-blog.com/2017/01/luis-the-ceo-of-duolingo-now-explains.html
October 7, 2017
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nice to see what the CEO said and how much has now changed
.
http://jackelliot.over-blog.com/2017/01/luis-the-ceo-of-duolingo-now-explains.html