As you saw, the game doesn't support a good variable-width font. I was going to deal with it but no translator ever stayed more than a week with me on that game so I kinda lost interest.
Everything is fairly simple in terms of file system if you know a bit what you're doing, but even then, it'll look awful without some asm hack.
Every file is changeable right now thanks to PleoNex and Hackotedelaplaque who helped me a long time ago as you can see here:
And with some change from my previous Tales of the Tempest project and some help from a friend I could add FMV subtitle via ASM hacking into Shining Force Feather:
the only thing that need for this project is:
1. A dedicated translator
2. Me and my motivation to add vwf into the game + fix bugs and whatnot.
I will not settle for a menu patch, it's counter productive and I've played this game entirely without any menu patch, it's really not that hard to understand.