the study of the sociological aspects of language. The discipline concerns itself with the part language plays in maintaining the social roles in a community. Sociolinguists attempt to isolate those linguistic features that are used in particular situations and that mark the various social relationships among the participants and the significant elements of the situation. Influences on the choice of sounds, grammatical elements, and vocabulary items may include such factors as age, sex, education, occupation, race, and peer-group identification, among others. For example, an American English speaker may use such forms as “He don't know nothing” or “He doesn't know anything,” depending on such considerations as his level of education, race, social class or consciousness, or the effect he wishes to produce on the person he is addressing. In some languages, such as Japanese, there is an intricate system of linguistic forms that indicate the social relationship of the speaker to the hearer.

Social dialects, which exhibit a number of socially significant language forms, serve to identify the status of speakers; this is especially evident in England, where social dialects transcend regional dialect boundaries.