As far as I know there currently isn't any Hindi translations, but you can create your own translation easily enough. Simply take one of the existing translations, and modify it.
When you're done you can release it on the Extend section.
http://www.pixelpost.org/docs/Languages/Languages
Here are a few translations that were created in this exact manor:
http://www.pixelpost.org/extend/languages/?req=1.7