All seems very, very dubious, particularly when looking at the about page:
As the world’s largest online language learning community, Livemocha fuses traditional learning methods with online practice and interaction with native language speakers from around the world. Livemocha delivers an unparalleled learning experience that promises conversational fluency. Since launching in 2007, the Livemocha community has grown to over 14 million members from over 195 countries, highlighting the international demand for an engaging and collaborative approach to language learning. Today the livemocha was reborn after the closing of the system by another company, but a developer decided to continue the primary idea, so we are recreating livemocha to improve and be the best network of language learners in the world, since we said that our network will never be charged and will never be sold or closed, we will be maintained by voluntary donations from our members.
So some random has nicked the branding, and taken part of the spiel from when the original site was the world's biggest language learning site, and is claiming to be the same site and the same community, and saying that a database of 14 million users that he doesn't even have is somehow bigger than Duolingo's database of 300 million...
I certainly won't be handing over any personal information.