DuckDuckGo has also been guilty of this, even when I disable the prominent "regional results" toggle. I am in France but have everything set to en_US, and on some searches of rare technical keywords it will still mix in "Visit France" tourist websites, often within the first page.
Ridiculous example: searching for "HID2HCI" (a bluetooth thing) returns as first result a business website from the French Alps. The second result is the English Wikipedia page for "Île-de-France" -- just why?? It doesn't matter which country I set in the "region filter" or whether I disable it entirely. And these "regional" results seem to be very random in that they will change and move up/down when I repeat the same search.
Ridiculous example: searching for "HID2HCI" (a bluetooth thing) returns as first result a business website from the French Alps. The second result is the English Wikipedia page for "Île-de-France" -- just why?? It doesn't matter which country I set in the "region filter" or whether I disable it entirely. And these "regional" results seem to be very random in that they will change and move up/down when I repeat the same search.