The document discusses pidgins, which are simplified languages that develop for communication between groups without a shared language. Pidgins have limited grammar and vocabulary borrowed from their parent languages. They are not anyone's native language. The document outlines the characteristics and origins of pidgins, and how some expanded pidgins developed into creole languages through increased complexity and by becoming the native languages of communities. Specific examples of pidgins mentioned include Chinglish, West African Pidgin, and Hawaiian Pidgin English.