topic: Per the United Nations, the Olympic Committee, and taking into consideration political geography, there are 5 Continents; America, Europe, Africa, Oceania and Asia.
Regarding the demonym, most english speaking people would use American as the denomyn for people form the US, which is technically correct since the name after all is United States of America, however in reality the USA has not chosen an official denonym nor an official language, and other demonyms, such as unitedstadians, are also technically correct and used widely outside of the USA. Referring to someone as only "american" sounds very vague to me, it doesn't really imply from which country you are from as America is very, very big. For instance, I am mexican, therefore I am north american, consequentially I am american.
I love language issues and learning about languages.
The issue here I think is that we are writing in English. In Romance languages I know, one can indeed say United Statesian.(translated). But that word does not exist in English, except as an overly literal translation.
In English, American commonly means a citizen of the United States of America. If a citizen of Mexico told me in English that they were American, I would incorrectly believe that they were a citizen of the US.
Unfortunately the English language does not correspond to the Romance languages in these matters,
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