Social dialect is a language variant formed by the different nature of social groups. It is a language used in a social group, social class or subcultural group. It is composed of different occupations, social status, political beliefs, and education. Degree factors or the linguistic differences formed by the community communication habits of these factors. The main differences are the language style and expression, and the use of some special words. According to the above definition, Which of the following options are not part of the social dialect:. ['Noble language.', 'Student cavity.', 'Legal terms.', 'Hakka.']