How I Learned 3 Languages in 7 Months — for Free (Duolingo)
Duolingo expands language offerings, shifts its business model, but keeps its price the same as ever: free.
In independent, third-party studies, 34 hours of online Duolingo study has been shown to deliver language proficiency equal to one semester of college-level language instruction
Anecdotally, many users agree that completion of an entire language “tree” (course of study) on Duolingo delivers proficiency roughly equal to two full years of college study, but takes only months to complete.”
Read more @ http://www.dailyfinance.com/2015/05/08/learn-foreign-languages-for-free/
Languages do matter!