Cantabrian dialect in the context of "Castilian languages"

West Iberian is a branch of the Ibero-Romance languages that includes the Castilian languages (Spanish, Judaeo-Spanish), Astur-Leonese (Asturian, Leonese, Mirandese, Extremaduran (sometimes), Cantabrian), Navarro-Aragonese and the descendants of Galician-Portuguese.

Until a few centuries ago, they formed a dialect continuum covering the western, central and southern parts of the Iberian Peninsula—excepting the Basque and Catalan-speaking territories. This is still the situation in a few regions, particularly in the northern part of the peninsula, but due to the differing sociopolitical histories of these languages (independence of Portugal since the early 12th century, unification of Spain in the late 15th century under the Catholic Monarchs, who privileged Castilian Spanish over the other Iberian languages), Spanish and Portuguese have tended to overtake and to a large extent absorb their sister languages while they kept diverging from each other.

Asturleonese is a Romance language or language family spoken in northwestern Spain and northeastern Portugal, namely in the historical regions and Spain's modern-day autonomous communities of Asturias, northwestern Castile and León, Cantabria and Extremadura, and in Riudenore and Tierra de Miranda in Portugal. The name of the language is largely uncommon among its native speakers, as it forms a dialect continuum of mutually intelligible varieties and therefore it is primarily referred to by various regional glossonyms like Leonese, Cantabrian, Asturian or Mirandese (in Portugal). Extremaduran is sometimes included as well. Asturleonese has been classified by UNESCO as an endangered language, as the varieties are being increasingly replaced by Spanish and Portuguese.

Phylogenetically, Asturleonese belongs to the West Iberian branch of the Romance languages that gradually developed from Vulgar Latin in the old Kingdom of León. The Asturleonese group is typically subdivided into three linguistic areas (Western, Central and Eastern) that form the vertical Asturleonese region, from Asturias, through León, to the north of Portugal and Extremadura. The Cantabrian Montañes in the East and Extremaduran in the South have transitional traits with Spanish (northern Spanish for Cantabrian, southern Spanish for Extremaduran). There are differing degrees of vitality of the language for each region in the area: Asturias and Miranda do Douro have historically been the regions in which Asturleonese has been the best preserved.

Torrelavega (Asturian: Torlavega) is a municipality and important industrial and commercial hub in the single province Autonomous Community of Cantabria, northern Spain.

It is situated roughly 8 kilometres from the Cantabrian Coast and 27.5 kilometres from the capital of the Autonomous Community, Santander, halfway between the Principality of Asturias and the Basque Country. The rivers Saja and Besaya [es] flow through the city.