Ethnolect

Lect associated with a certain ethnic or cultural subgroup

An ethnolect is generally defined as a language variety that marks speakers as members of ethnic groups who originally used another language or distinctive variety. According to another definition, an ethnolect is any speech variety associated with a specific ethnic group. It may be a distinguishing mark of social identity, both within the group and for outsiders. The term combines the concepts of an ethnic group and dialect.

This keyword could refer to multiple things. Here are some suggestions: