I perfectly know how to do that and I speak a language that isn't uncommon, but generally translations introduce minor/annoying bugs, like text overflowing text

I perfectly know how to do that and I speak a language that isn't uncommon, but generally translations introduce minor/annoying bugs, like text overflowing textboxes etc., and the quality of the translation can be an issue too (spelling errors, technical terms translated in strange ways,...). Also, the material found on the web for that software (help, tutorials, etc.) also come in English as well. Trivial example: in multiplayer games knowing the English name for items, locations etc. helps with communication with other players. So I tend to set the interface to English even when it is auto-detected correctly.