Summary
Pennsylvania-based Duolingo is a site that lets consumers learn a new language for free while helping to translate the web.
Description
A native English speaker interested in learning Spanish, for example, can begin by signing up with Duolingo. The site then gives the user single sentences to translate at a level that’s simple enough for a beginner. Users can always request possible translations for words they can’t figure out, and Duolingo helps them learn and memorize those words afterwards through educational examples. They can also see how others translated the same sentence and vote on the quality of other students’ translations. As they gain proficiency over time, the sentences they get become more complicated.