Regional dialects and ethnolects
In contrast to their general high level of tolerance for the dialects of other English-speaking countries, American English speakers often express disdain for features of certain regional dialects, such as Southern American English's use of y'all as the second-person plural personal pronoun (such disdain may not be restricted to points of grammar; speakers often criticize regional accents and vocabulary as well).

Arguments related to regional dialects must center on questions of what constitutes Standard English; for example, since fairly divergent dialects from many different countries are widely accepted as Standard English, it is not always clear why certain regional dialects, which may even be very similar to their standard counterparts, are not.