You mean how you just called people from the United States Americans? Maybe you forgot about Central and South America? There are 35 countries on this side of the pond. Also, there is a LOT of variety in the US. We have over fifty dialects and arguably more. We have people that are native German speakers (with several unique dialects and daughter languages, Latinos that are native Spanish speakers (along with many dialects and daughter languages from many countries as well), Native Americans with MANY cultural and linguistic differences from Alaska to South America.