(Gadje here) stereotypes that aren't known in the USA

Hi, I'm an American and trying to be a writer for science fiction. I just want to ask if there are lesser known stereotypes that might be well known outside the United States; so I can keep them in mind when writing ideas for cultures or stories when I am working and not land on anything too close to something negative or sacred? Asking since I write a lot of cultures and in turn some will inevitably resemble some other cultures in some minor ways, I just want to avoid explicit duplicates.