This document discusses language variation and the different varieties of language. It defines key terms like dialect, idiolect, and varieties. A dialect is a language variety spoken by a speech community that is distinguished by systematic features. An idiolect refers to the speech variety of an individual speaker. Varieties refer to forms of language associated with social factors like region, social class, situation, and individual. Dialects and varieties differ based on factors like geography, occupation, age, education, gender, and ethnicity. While some dialects have more prestige than others due to historical and social factors, all languages consist of dialects and everyone speaks at least one dialect.