Kingdom Hearts Final Mix is the director's cut released only in Japan in 2002. It adds:
(Japanese) and download a reputable patch, such as those found on or from creators like Crazycatz00 Kingdom Hearts Final Mix Iso English Patch
The most famous translation project was completed by the modding group (and later refined by others). It translates 100% of the game, including: Kingdom Hearts Final Mix is the director's cut
Some patches even use the official text from the later Kingdom Hearts HD 1.5 ReMIX for consistency. How to Patch Your ISO Kingdom Hearts Final Mix Iso English Patch