@raum It’s not a thing. Not in the US. My only point was both tartar sauce and ranch were mentioned above and for jellies outside of the US they might have no idea what those are. @ragingloli tends to know an amazing amount of information about the US, but I would say he/she knows more than the average person, especially if they have never been here.
When I travel abroad one of the things that is easier for me in most countries is most of the house dressing on a salad won’t be creamy, most sandwiches won’t have some sort of creamy sauce. This is a constant annoyance living in the US, although it’s much more prevalent in the Deep South and Midwest.
Moreover, people like me who can’t fathom putting mayo even on a sandwich (with the exception of tuna fish or chicken salad) definitely aren’t dipping our fries in it, or anything close to it.
I think of German food as generally being heavy, although funny enough German potato salad is lighter than American potatoes salad, because they use more of a vinegar base, or at least the Germans in the US do. That might be regional in Germany. I don’t eat potato salad usually, because of the mayo. I have a really tough time at picnics and outdoor parties in the US in general. I know not to show up very hungry.