Japanese Language Support?

[c21xhunter-crypto]

Hi all.
Is there any way to remove the translation from this game and keep it in Japanese?
This feature was removed in the 1.3 patch and left as-is, and since the last update was two years ago, I don't have much hope for it being fixed.
I was thinking of enjoying MHP2ndG before Master rank arrive at MHWilds, and I just discovered FUC for the first time — I was blown away. As a Japanese person, I'd really love to play it in Japanese, but is there any good way to do that?
I've been asking AI and trying things with the Debug Patcher, but even when I manage to partially revert things, I just can't get item names or the basic UI language back no matter what I try. I've never done any kind of development work, and honestly the bar is just too high for me.