A pidgin is a grammatically simple language that develops as a result of intense interaction between speakers of two or more different languages when the speakers do not fully learn the language of each other but instead use vocabulary of the social elite/dominant group and the grammar of less prestigious but more frequently spoken languages.
Eckert (chapter 19) defines vernacular as the language that is the most closely associated with locally-based communities. The standard is the language that is used in ‘globalizing institutions,’ which include schools and universities, business and government offices, and banks.
The concept of language variation is central in sociolinguistics. The English language varies on individual, regional, national and global levels. Unfortunately, some people are unaware of various social and regional dialects, and different varieties of English in the world.