nativization
Nativization is a term used in linguistics and related fields to describe the process by which a language variety becomes native to a community. In its core sense, it refers to the transition of a contact language, such as a pidgin or a transplanted colonial language, into a fully established first language (L1) for children and long-term speakers. When a pidgin is nativized, successive generations begin to acquire it as their primary means of communication, often resulting in greater linguistic structure and stability than in the original pidgin stage.
In creolistics, nativization specifically denotes the development of a pidgin into a creole that is learned
Factors influencing nativization include demographic change, social integration, education, language policy, and attitudes toward the contact
Examples often cited in the literature include Haitian Creole, which emerged from French-based pidgin speech communities