It sounds like you’re looking for about installing Monster Hunter Rise on a Nintendo Switch using NSP/XCI files, including USA/JPN region compatibility and DLC.
The game is available in both USA (English) and JPN (Japanese) versions. The main difference between the two versions is the language used in the game, with the USA version featuring English as the primary language and the JPN version featuring Japanese. monster hunter rise switch nsp xci usa jpn dl install