West African Pidgin English the river systems into the West African interior because of its value as a trade language among Africans of different tribes. Later in its history, this useful trading language was adopted as a native language by new communities of Africans and mixed-race people living in coastal slave trading bases such as James Island, Bunce Island, Elmina Castle, Cape Coast Castle and Anomabu. At that point, it became a creole language. Some scholars call this language "West African Pidgin English" to emphasize its role as a lingua franca pidgin used for trading. Others call it "Guinea Coast Creole English" to emphasize
Mixed language not include Michif, which combines French lexical items in specific contexts, but still utilizes Cree lexical and grammatical items. Yaron Matras distinguishes between three types of models for mixed language: "language maintenance and language shift, unique and predetermined processes ("intertwining"), and conventionalisation of language mixing patterns". The first model involves the use of one language for heavy substitutions of entire grammatical paradigms or morphology of another language. This is because a speech community will not adopt a newer dominant language, and so adapt their language with grammatical material from the dominant language. Bakker (1997) argues that mixed languages result from