DUOLINGO
Duolingo
Duolingo is a free language-learning website and crowdsourced text translation platform. The service is designed so that, as users progress through the lessons, they simultaneously help to translate websites and other documents., the site offers Latin American Spanish, French, German, Brazilian Portuguese, and Italian courses for English speakers, as well as American English for Spanish, French, Portuguese, and Italian speakers.The above text is a snippet from Wikipedia: Duolingo
and as such is available under the Creative Commons Attribution/Share-Alike License.