Introduction.The extinction of languages ​​is a well-known topic among linguists. This has happened since the beginning of human language and will undoubtedly continue until the end of time. But in the contemporary world, this phenomenon has acquired a particularity because it is part of globalization. Today we are spectators of the death of languages ​​which have survived over the centuries, but which cannot face the new challenges posed by the global village. The variety of Catalan spoken in the Italian city of Alghero, on the west coast of the Mediterranean island. of Sardinia, known as Algherese, could be considered an endangered language and, therefore, threatened with extinction in the coming decades. The reasons for this situation are strongly linked to the social and economic situation of the local Catalan-speaking community. Algheresis from a linguistic point of view. Algherese is considered, essentially, as a dialect of Catalan. Obviously, as happens quite frequently when a linguistic variety is spoken in a geographical area far from the core of the language, some researchers defend a different position, arguing that it has enough differences to be considered a language in its own right. But our position is very clear on this point: Algherese is a dialect variant of Catalan, although with greater differences compared to other varieties which make it an isolated, idiosyncratic and consecutive dialect. Algherese is part of the Eastern Catalan division, with seven centuries. ´ history, and because of its own historical details, it deserves the honor of constituting a unique group. At the beginning, its origins are quite important to understand the heterogeneous and distinctive features of Algherese, as ...... middle of article ......ingen: Walter de Gruyter, 129-138.- Navarro Barba , Gustavo (1999), “El català al´Alguer i la legislació sarda i Italiana”, Llengua i ús, 14, 61-64.- Perea, María Pilar (2010), “The dialect of Alghero: continuity and change” , in Millar, Robert McColl (ed.), Marginal dialects: Scotland, Ireland and beyond, Aberdeen: Forum for Research in the Languages ​​of Scotland and Ireland, 131-149. - Sari, Guido (2010) , “L´algherese e il sardo. For a response to relationships with the minority language in contact”, Insula: Quaderno di cultura sarda, 7, 89-109.- Sendra i Molió, Josep (2012), “El català a Sardenya a través de la documentació dels comtes d’ Oliva (segles XVI-XVIII) (1a. part)”, Cabdells: Revista d’investigació de l’Associació Cultural Centelles i Riusech, 10, 15-76.- Simon, Sophia (2009), “Algherese? Si, ma solo per scherzare”, Zeitschrift für Katalanistik, 22, 37-70.