The USA's population is diverse, with people who come from a variety of cultural heritages. According to the 2020 Census, the United States is more diverse than it was a decade ago. With this in mind, it is incorrect, and in fact offensive, to assume that all people from the USA look or act a certain way.
There is no "Standard" version of English. Our games tend to use U.S. English, but British English and U.S. English are completely different languages.