by people

Sociolinguistic relativity refers to the set of conventions, rules and patterns unique to a community which they use in conducting communication.

Language choice in sociolinguistic will give the speaker a valuable edge. It will place one in an advantageous position in communication within group or within a wider social context due to the fluency in the language.

the ability to communicate with different people, from different social groups

Sociolinguistic engineering refers to intentional efforts to influence language use and behavior within a society or community. This can involve promoting certain languages or dialects, shaping language policies, or influencing language attitudes to achieve specific social or political goals.