wow I would be happy to have something in Hindi for this collection. Even though I need someone to PL the section, as I cannot read the script at all.
at first glance, no, I don't think this is an acceptable site. I don't see any original scans from books older than 1923. (please correct me if I'm wrong and give me an exact link to a scanned text). We need this to confirm the text is out of copyright and unaltered from what it was in the original.
Have you tried checking on archive.org ? I think they have a large collection of books scanned by Indian libraries, there is bound to be many in Hindi. A simple search for "Hindi" gives me over 50,000 books
maybe there is something to your liking. Now what is important is that you check inside the book that there is a page stating the publishing date. It needs to be before 1923. If the scanned book has such a page, then I would say it's safe to use.
Unfortunately I cannot further help here, because I don't speak the language at all, or decipher the script.
Good luck, and I hope you find something.