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The emergence of private radio stations has considerably changed the mediascape in Tunisia, a country which has had public radio for some considerable time. Mosaic FM was the first, and despite the arrival of a plethora of new private stations, it still has the largest audience. Within media studies it is possible to adopt various types of observation. I am particularly interested in looking at media production using anthropology of language. In this article, I set out my fieldwork observations and show how one editorial line, which favors a relaxed styled in terms of language use, comes into conflict with another editorial line, implicit and non-consensual, which criticizes such relaxation by limiting and « correcting » the use of regional varieties other than that of Tunis. I conclude by showing how these positions bring sociolinguistic invisibility to certain actors, as well as making the use of certain varieties normal, and others abnormal.