I don't consider countries much. There are definitely some differences per country, but I think the variation even within a same university is so large that its hard to infer much based on country of origin. But I acknowledge that I ignored that part of your comment in my reply and maybe in that left a wrong impression. But I meant no implication that this was somehow US-driven.

Internationalism is so ingrained in the academic culture (at least on fields I'm familiar with) that it doesn't even really register what country somebody's from or is working in. There are definitely some differences especially in the more "overt" parts of the culture (hats and robes and different titles etc), but these are of very little significance for anything but some ceremonies.

My working experience is from Finland, Sweden and UK, but in academia people come and go between countries very frequently so colleagues tend to be from all over.

There are at least some stereotypes that some countries are more prone to the e.g. citation rings, but I don't find that very relevant, as I think the whole system is quite broken and the publishing (at least in English language) forums are typically not country specific at all. Probably something like this happens in more or less any country.