My work computer's Win 11 install is originally French, I'm using the English UI. Searching for "Display" in the start menu shows me Display-related settings... in English and French. Looking at it closely, the English results point to settings available via the Control Panel, and the French ones point to settings in the "Settings" app. Picking a French result opens the Settings app, in English.

But yeah, Microsoft competency means it's also fine to show some search results in the language which isn't the user's preferred UI language.