The document discusses sociolinguistics and related topics. It begins by defining language planning, which involves governments deciding official languages. Next, it describes pidgins as contact languages between groups without a shared language used for practical purposes. When a pidgin becomes a community's native language, it evolves into a creole. Creoles have native speakers and are no longer restricted in use. The document concludes by explaining the post-creole continuum, where a creole evolves varieties ranging from basilects with more creole features to acrolects closer to the standard language.