If you’re seeking the game to play in Spanish, your best bet is to buy a physical PAL Spanish copy (e.g., from Spain) and play it on an original N64 or a compatible emulator (using your own dumped ROM).
Yes! In 2019, Microsoft (who now owns Rare) released Conker’s Bad Fur Day: Reloaded via on Xbox One and Nintendo Switch (via cloud). That version includes official Spanish subtitles and menus. conker bad fur day rom espanol n64 romsmania better link
: A community-curated collection of verified, safe links for nearly every retro system, including the N64. Safety Warnings for Romsmania If you’re seeking the game to play in
Q: Can I play Conker's Bad Fur Day ROM on my PC? A: Yes, you can play Conker's Bad Fur Day ROM on your PC using a compatible emulator. That version includes official Spanish subtitles and menus
: The most beginner-friendly option with a simple setup for Windows.