Actually, literally the entire world excepted the US does call them “United States of America”, if not only “United States”, with traductions of those. The French use “États-Unis”, often not specifying America, as do the Spanish speaking world with “Estados unidos”. And, yeah, we often just say “Germany”, 'cause Germany doesn’t try to appropriately the name for the entirety of the continent they sit on, like that one weirdo country does.
Actually, literally the entire world excepted the US does call them “United States of America”, if not only “United States”, with traductions of those. The French use “États-Unis”, often not specifying America, as do the Spanish speaking world with “Estados unidos”. And, yeah, we often just say “Germany”, 'cause Germany doesn’t try to appropriately the name for the entirety of the continent they sit on, like that one weirdo country does.