Eh, I don’t think the difference in continent classifications is purely a linguistic one. Eurasia, Europe, and Asia are all continents in British English, depending on context. So are Australia and Oceania. All these terms have multiple meanings anyways. English speakers in the UK refer to the U.S. as “America”, while Spanish speakers in the U.S. call themselves (rather than Canadians) as norteamericano/a instead of the more erudite estadounidense. The notion of the Americas as a single continent is not completely unheard of in the U.S.; it’s just somewhat obscure like Eurasia and Oceania.