I have the same problem with Russian language. I think it's a bug and it should be fixed (because using English interface when Minecraft has a translation for your language is strange).
There's a similar bug when GUI scale set to small (and Russian language is selected). All text on buttons in GUI and text in chat becomes unreadable (same as on debug profiler). I'm not sure if I should open a new issue for this bug.
I have the same problem with Russian language. I think it's a bug and it should be fixed (because using English interface when Minecraft has a translation for your language is strange).
There's a similar bug when GUI scale set to small (and Russian language is selected). All text on buttons in GUI and text in chat becomes unreadable (same as on debug profiler). I'm not sure if I should open a new issue for this bug.