Sorry for the late reply, so I got to understand from Discord that Shift Jis works for English and Japanese or any other languages in Latin alphabets. For languages like Russian, one just needs to add up in the engine to receive support for Russian as shift jis. Cryptic languages are from Windows ansi script, so they could be modified, but sadly Hindi doesn't come in those languages, so the only way to do it is to find a hacker who can either hack the font file to add up Hindi letters or hack the game itself to support Unicode. This is how it was done for the Korean patch for Kara no Shoujo, but sadly, I wasn't' able to find a hacker till now.