Duolingo explained by Luis .

[Jack.Elliot]

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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

[Woof.]

Merci !

[Camilla-danesa]

yes, I remember. Thank you for bringing it into light again. I hope you are having a beautiful day.