Translations for Facebook Connect is available as a free tool for developers worldwide to simplify the process of translating a website, IFrame or FBML-based application into any of the languages Facebook currently supports.
For example, with Translations for Facebook Connect, country tourist boards or travel sites that want to attract foreign visitors on holiday can use this framework to translate their sites and automatically present the content to users in their native language after they log in with Facebook Connect.
Check this one too, at the Ning: Collaborative Translation
Facebook On Its Way to Being A Social Superpower /
Facebook Acquires FriendFeed (Social Network Aggregator)
As well as the sub-group: Google Translator Toolkit