I couldn't tell you why the Spanish version works, but keep in mind, the SuperCard SD/miniSD/Lite aren't really designed to be GBA flashcarts. You can run GBA games on them, but they were designed for DS ROM loading back when a GBA cart was required to do that. They lack the fast onboard flash GBA games need to run smoothly and without issues. Meaning a lot of games have lag or may not work at all. If you want a good GBA flashcart that won't have these issues, look at the EZFlash Omega Definitive Edition, or if that is too expensive, you can go for the normal EZFlash Omega. Both are great cards with similar/same compatibility, DE just has some nice improvements over the original.