Regional variation

Pidgins

 A pidgin is a contact language with no native speakers, emerging in situations where people with no common language need to communicate with each other, e.g. for communicating in business/trade contexts. From Chinese; business. 

Lexifier language→

The dominant language that provides the majority of the vocabulary (lexicon) for a pidgin or creole language.

Creolization

When a pidgin becomes the first/native language of a generation, it creolizes and gradually turns into a fully functional new language. Extended vocabulary, more complex

grammar. 

Decreolization

When speakers of a creole start to use fewer creole features and more of the standard variety of the lexifier language. 

Post-creole continuum

different variants of the creole being spoken side by side, depending on context and the speakers’ education, e.g Jamaica, Cabo Verde, and also Papua New Guinea.