my best bet, the japanese version reads hex 00 as end of sentence.
the US version has 00 between all letters.(ordinary space)
the japanese version however has 83 (between letters in a name, appears like space) and 82(between letters in a sentence, appears like ,)
you could perhaps try replacing any space with 83/82 manually, but that would take ages.
note: these "spaces" (00, 82, 83) don't appear in the game.
Those are because the Japanese text is written in
Shift-JIS encoding, which uses two bytes for each character, while the English text is in ASCII, which uses one.
QUOTEEdit: Did more fiddling with the Game file and I got this. 2nd image is after doing more fiddling and I got 1 script file out of 1371 done.