A way that I think would be useful is, presuming you're on "fastfood.com" and not "germanfastfood.com", have a search box where you enter the food (pizza) and a

A way that I think would be useful is, presuming you're on "fastfood.com" and not "germanfastfood.com", have a search box where you enter the food (pizza) and a location, which would be automatically filled with the GeoIP location, or blank if you can't determine. That way it's helpful if you are in Germany, but you can change it easily, and aren't forced into it (it's more of an opt-to rather than opt-out)