Duolingo can’t teach you how to speak a language, but now it wants to try - Duolingo has been wildly successful. It has pulled in 500 million total registered... - http://feedproxy.google.com/~r/Techcrunch/~3/2vafG5bdGhc/ #carnegiemellonuniversity #languagelearning #luisvonahn #pittsburgh #education #startups #duolingo #ecedtech #babbel #edtech #busuu #ec-1 #tc