Learn a language, translate the web

摘要

Luis von ahn claims he can translate Wikipedia - all 2 billion words of it - from English into Spanish in Just 80 hours. What's more, he will not have to pay anyone to do the work. His secret weapon is Duolingo, a free language tutorial website that doubles as a paid-for translation service. The deal is that users get to learn a language while simultaneously helping to translate website content.