Is that insane? Every game[0][1] I ever helped ship has had fully localized UI. In game development that seems to be the standard way of doing things. And it requires a lot of testing and sometimes comes with workflows to automatically test that all strings fit their intended box.

[0] Before I worked on game development I actually worked in virtual surgery simulation, and there we also had a localized UI with a very large number of supported languages and tooling to detect issues.

[1] Need For Speed (2015), NFS: Payback, NFS: Heat, Lost in Random, Wavetale

And accessibilize it. Pixel perfect per zoom level per language per font variant per font.

Don't forget increased-contrast too!