Okay. So people who speak the same language should be in the same country?
That is an oversimplification. Language along with ethnicity is the most obvious divider between peoples, but not the only one. I simply used it as an example due to its obviousnes, the definition of nation i find to be the most based on reality is: “A nation is a historically constituted, stable community of people, formed on the basis of a common language, territory and psychological make-up manifested in a common culture.”
Or is it possible for people who speak the same language to be in different countries?
It is possible and happens, most notably with the Anglos, although there is a debate to be had whether the anglo states should unify under a common state, seeing as they pretty much are the same nation. An Englishman can easily move to Australia, understand everyone, and be indistinguishable from other Australians fairly quick. But were the same Englishman to move to Nigeria for example, he couldn’t communicate with anyone, and would never assimilate into the nation.
The US is the de facto leader of the West, if it embargoes a country, it is embargoed by the West as well.