Correct. As I mentioned in my previous post, FEOEZ uses the SPC7110. That is NOT emulated by any emulator yet. Those games still use graphics packs.
As I mentioned though, this is fairly irrelevant for a translation of this game. You can do most all of the required work without having to do anything with the graphics packs. In the event that do have to modify a few of the graphics packs graphics, you can most likely expand the ROM(It's large already, but there's still room for expansion) and store and load them there. That way, it's future proof and won't break when the chip is ever emulated.