I found a problem with the country flag displayed at the German website of Fairphone.
Unfortunately I (as a new user) can embed only one image in a posting, so I have to show both flags in one screen shot.
I opened the German website of Fairphone: Entdecke das Fairphone 3, Fairphone 3+ | Nachhaltige Smartphones
There I see at the top an invalid flag for Germany (I think it is the flag of the Netherlands).
See upper flag in the screen shot.
When I click on this flag and just confirm the settings (Germany and German), then the correct flad is shown.
See lower flag in the screen shot.