discu
Newsletters
Mentions
Extension
Pricing
Login
Sign Up
Reddit
Duolingo opens to the public after 125,000 users translated 75 million sentences during beta
http://www.webpronews.com/duolingo-goes-public-after-125000-users-translated-75-million-sentences-during-beta-2012-06
19 comments
19/6/2012
compsci