Patching text in Jap games?

would it be possible to import text maybe from say a psx version of grandia to the jap saturn some how or any other game that has already been ported over like lunar and stuff becuase it would be great to play these games on the saturn and actualy be able to understand it
No, I've tried that already, with Grandia. The scripts for the PSX game are in a completely different format than those on the Saturn.
It doesn't work that way. And, not all text is in a magical file. Most of the time, the text is embedded into images, etc.