Taking Menendez Pidal’s dialectal classification made in his work of 1906 as starting point, as well as others made by R. J. Penny, F. García González and others, a survey was made with the aim of dealing with oriental variety of the Astur-Leonese area; at the same I will also deal with time, the linguistic situation from Cantabria where we can find two clearly separated areas; the north-oriental one and the Santiyanesa one which is great deal responsible for the continuation of the area in the east side; another one south- oriental or reinosino-tresmierense really influenced by the Castilian language together with Las Encartaciones from Vizcaya. A possible internal organization of each of these two areas is also dealt with as well as the historic process that took to the deep castellanization of Cantabria.

Partiendo de la clasificación dialeutal de Menéndez Pidal, nel so trabayu de 1906, y analizando trabayos de R. J. Penny, F. García González y otros, faise un estudiu qu’empobina a falar de les llendes orientales del dominiu llingüísticu ástur; al empar alviértese de la situación llingüística de Cantabria onde se dixebren nidiamente dos estayes, una nor-occidental o Santiyanesa en bona midida contiuadora del dominiu ástur contra oriente; otra sureño-oriental o reinosino-tresmierense fondamente castellanizada xunto a Las Encartaciones vizcaínes. Alúdese, al empar, a posibles organizaciones internes de caúna d’estes dos estayes y pásase a ver el procesu hestóricu que llevó a una castellanización fonda de Cantabria