: Emulation software itself is legal. However, downloading copyrighted ROMs (piracy) is illegal. The "legal" method involves dumping a copy of the game you personally own from your own Nintendo Switch.
If your ROM is JPN-only, download the "MULTI_5_UPDATE" patch. It injects English/French/Italian/German/Spanish text and audio. Metroid Dread - Yuzu Ryujinx Emus for PC- MULT...