What type of contact language form develops and is adopted permanently?

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Creole is a contact language that develops when two or more languages come together and create a simplified, mutually understood language. Once a creole language is adopted permanently, it becomes the native language of a community and can continue to evolve and develop into a full-fledged language. Accents, dialects, and pidgins are also contact language forms, but they do not typically develop into permanent, distinct languages like creoles do.

What Type of Contact Language Form Develops and Is Adopted