Hello !
Actually, I managed to do all the translations myself. Although, I don't know if I made some mistakes in some words, so I'm gonna publish the Spanish version and you'll check the texts if I made mistakes. But I think I did my best to understand Spanish, thanks to the Sonic Advance's Spanish instructions manual.
However, you can either keep translating what I gave to you or checking out the Spanish mods that I'll publish. What do you say ?