The metaphor of language is an influential sociological metaphor. It is, as Brown would put it, a root metaphor, since it functions as a widespread, often implicit general frame for imagining, observing and understanding social structures and processes.
Further, for many sociologists, "social phenomena" are not like language, but they are language. Seeing reality as language, however, can mean very different things for sociologists and can even have conflicting theoretical and methodological consequences.