Sociolect 社会方言
In sociolinguistics, a sociolect or social dialect is a variety of language (a register) associated with a social group such as a socioeconomic class, an ethnic group (precisely termed ethnolect), an age group, etc.
Sociolects involve both passive acquisition of particular communicative practices through association with a local community, as well as active learning and choice among speech or writing forms to demonstrate identification with particular groups.