This screenshot is taken after I've added just plain "English" to my installed languages. Spotlight works again.
Note that the 'sort' box only offers English as a sort option, not U.S. English. This is what gave me the hint that I probably needed to install English.
Anyway... off topic, sort of, but in case it helps any other US users.
Cheers,
Karl
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators