This document discusses varieties and registers of spoken and written language. It defines language, spoken language, and written language. It then explains that language variety refers to distinctive forms of a language influenced by social factors. The document outlines different registers including frozen, formal, casual, consultative, and intimate. It also discusses types of dialects such as regional, sociolect, ethnolect, and idiolect. Finally, it categorizes language varieties as dialect, register, pidgin, and creole and provides definitions for each.