Need to be careful with terms. Hacking can refer to both modifying the hardware and software. In this context, probably software hacks, like ROM hacks. Also, ROM hacks can be translations or graphical modifications.
Need to check if Dolphin emulator supports language switching via patches. Some ROM hacks might require specific emulators to function correctly. gamecube+roms+espanol+hack
While many hacks are developed in English, the Spanish-speaking community has translated several and created unique versions: Pokémon XD: Gale of Darkness Director's Cut Need to be careful with terms
La comunidad está más viva que nunca. Proyectos actuales: probably software hacks
: This is the most active scene, with hacks like "Faster Melee" or balance patches that are used in competitive play.