The linguistic differences existing on the island of Sardinia will be illustrated in his article by the presentation of a series of graffiti. We will then discover what their meaning is and how they can be considered cultural texts. This study shows how graffiti, if we consider them as cultural texts, will offer us important insights into the relationship between orality, identity and writing. in Sardinia, a region that has a different culture, a different political vision and a different dialect from the rest of the country. 23 graffiti were studied (out of 140 graffiti found), all originating from Cagliari, the capital of Sardinia. To define the aim of this study, we will quote the author who says: “I present some considerations on the relationship between graphic production and orality in the production of graffiti. More precisely, I am interested in graphic deviations from written conventions (more or less established), which are produced to assert an identity or to obtain a humorous effect” (Depau, 2012, p..