Final Fantasy Hacktics

I'm Thai & i love this game so much!

after i found this site, I've some idea about Thai language patch but i need to add thai fonts into the system

how can i add Thai fonts into the FFT?

This should give you a good idea what to edit: http://ffhacktics.com/wiki/Font

However, since FFTactext forces some of its own characters for the DTE, compressing to characters like "th" together as a single one, you won't be able to use that tool. I don't really have info on the text table offsets or anything, but IIRC they're all grouped together in a small table.