If you are interested in Machine Translation(MT) then you should read this great introductory article on Apertium MT system. Well I didn't know that Apertium is the open-source Systran (the engine that powers Babelfish) Did you? .
At the time of writing this post, there are no stable language pair for Indian languages in Apertium, If you are interested in working on one, do send me a shout out.
Kudos to Jimmy O'Regan for writing this one.