Getting it wrong in this way is rather puzzling, but it's unlikely that anyone here is going to be able to debug it without a whole lot more information about your computers. Maybe there are cookies you can delete?
But again, my gaming PC, which was offline in my apartment in Seattle, has been showing me Mexico/Spanish results in Edge. And my TV, which sits in my apartment in Seattle, is inundated with Spanish ads.
I'm starting to suspect that different Google properties are using different signals, too, which makes this extra confusing.
It's really as if YouTube has modified it's profile of me and said "oh, since he was in Mexico for 2 weeks, he must speak Spanish now" the same way they *infuriatingly* insist on switching my results to Spanish whenever I first landed (which literally was why I started using the VPN).
It's a kafka-esque nightmare of them trying to be smart and absolutely making things harder.
J/K. Have you tried all the stupid stuff like clearing your cache and logging out and back in?
Idk why everyone is so gung-ho to disbelieve me. Theres NO EXPLANATION for what im seeing other than Google keeping a hint for my IP and it being currently set to "being in Mexico".