Configure Dolphin’s language settings to Español . The emulator will automatically select the matching language from your dumped ROM.
Download the latest Dolphin Emulator from its official website (dolphin-emu.org). Do not use third-party "all-in-one" installers. gamecube roms espanol link
Use a compatible DVD drive (e.g., LG WH14NS40) and software like CleanRip (on a modded Wii) or Imgburn (on PC) to dump your disc to an ISO. Configure Dolphin’s language settings to Español
Buy a used GameCube disc from Wallapop (Spain), Mercado Libre (LATAM), or eBay . Look for the "EUR" or "ESP" designation on the box. Mercado Libre (LATAM)