An interesting thread about Websites in Hindi is on the Serif forum.
https://community.serif.com/forum/webplus/8615/websites-in-hindi
I know that there can be issues over the correct rendering of some Indian languages, though I do not know if that applies to Hindi specifically.
It is possible that browsers and Adobe Reader resolve those issues, but I do not know.
Does anyone here know about this please?
William Overington
24 February 2014