I made a quick edit to add those tools to the wiki.
Thanks a lot Samurai Goroh.
I didn't did it before because anytime I uploaded a new version, the link to the file changed (obviously!) and at the end I just forgot to add them to the wiki when the last stable versions were released.
Currently both projects are stopped but published on github. Everybody is free to get the code and use it in any way he/she/it want.
How does one go about editing the dialogue of final fantasy 5?
Well... is just like editing dialogues in any other SNES game:
1. You have to look the rom to find the text tables and how text strings are stored.
2. After that, you should develop a tool to extract and insert the text data. Maybe you'll only need an hexeditor as Jorgur pointed out.
3. Maybe you have also to find the font graphics if you need new characters and again, develop a tool to extract and insert graphics...
4. Doing that, you can break the rom, so you'll need a lot of testing.
It's a lot of job... If you want 'only' edit some texts in this game, you can use the editor mentioned in previous posts.
We have EVEN MORE themes now, but some old ones are gone...