To find PS2 ROMs (ISOs) and BIOS files in Spanish, the most reliable approach is to use established retro gaming repositories that host multi-language or European (PAL) versions of games. European releases almost always include Spanish as a built-in language option.
, aunque técnicamente son archivos de imagen de disco con extensión ¿Dónde encontrar juegos de PS2? roms y bios en espanol para ps2 link