Usually means your firmware is too low.
If you’ve downloaded the files but the game won't launch, check these three pillars of Switch homebrew: 1. Firmware Version monster hunter rise switch nsp xci usa jpn dl work
This is almost always a sigpatch issue. Update your patches and reboot. Usually means your firmware is too low
These are essentially digital eShop installs. They install directly to your SD card or System NAND. including English and Japanese.
Most versions of the game (both USA and JPN) include multi-language support, including English and Japanese.