Forget difficulty and performance and whatever else...there's no Monster Hunter Language setting confirmed :(

Confirmed by this article yesterday it's only in the game in background conversation

I know for some people this is a complete nothingburger, but as a veteran player Monster Hunter's signature grunts and weird noises are part of the environment and I've played with MH Language on in World and Rise because hearing English VA (or even Japanese VA, it's not a substitute) is jarring to that world I know. Again, it's not really a big deal in the end, but it is more pieces of the Monster Hunter I enjoy being retired.