It's a social approach to learning a language, and one that's cheaper than pricey software like Rosetta Stone - basic courses are free, and utilizing the community costs only a small monthly fee.

用LiveMocha来学习是你学一门语言的社交方式，而且它比Rosetta Stone软件要便宜得多——在LiveMocha上，基本课程都是免费的，而使用社区的话，每月也只需要你支付一点点费用。

youdao

Livemocha – Livemocha is a free community language learning tool with online interactive lessons, user created courses, and language partners that are ready to practice with you.

Livemocha：具有网上互动课程，用户创建课程和语伴寻觅功能的语言学习论坛。

youdao

Within this site, you will find multimedia learning methods and tools that are easy and fun to use. Babbel also offers a language exchange community with more than 400, 000 registered users.

具有多媒体学习方式，简单易用，且有一个四十万注册用户的学习论坛。

youdao

"If they don't have access to learning a sign language that's already in existence, then a community of deaf people will find a way to communicate, " said Leanne Hinton, a professor emeritus at the University of California at Berkeley.

CNN: Researchers document distinctive Hawaii Sign Language