Acrolect

The linguistic term acrolect refers to the use and knowledge of a higher or "proper" form of a language, especially in an area where a creole (language that naturally develops as a result of a mixture of languages) or colloquial dialect is in common use.

An example of this is the Appalachian dialect of English that is found in the Appalachian/Blue Ridge mountain area of the U.S. as opposed to the standard American English that is taught and used in most of the rest of the country. This dialect is readily noticeable through the use of non-standard grammar and archaic vocabulary that more closely resembles Shakespearean English than modern day American English..