Indranil informs me that an NGO in WB tried to misappropriate work done by free software community (Ankur Bangla). May be he can put more light on what happened there.
All Available distribution including gNewSense fully supports Tamil. Even Controversial BOSS GNU/Linux http://sankarshan.randomink.org/blog/2008/09/03/what-a-waste-of-talent-and-money/ Supports Tamil well