text: However, modern Basque has had lexical influence from Gascon in words like beira ("glass"), which is also seen in Galician-Portuguese. One way for the introduction of Gascon influence into Basque came about through language contact in bordering areas of the Northern Basque Country, acting as adstrate. The other one has taken place since the 11th century over the coastal fringe of Gipuzkoa extending from Hondarribia to San Sebastian, where Gascon was spoken up to the early 18th century and often used in formal documents until the 16th century, with evidence of its continued occurrence in Pasaia in the 1870s. A minor focus of influence was the Way of St James and the establishment of ethnic boroughs in several towns based on the privileges bestowed on the Francs by the Kingdom of Navarre from the 12th to the early 14th centuries, but the variant spoken and used in written records is mainly the Occitan of Toulouse.
  The énonciatif (Occitan: enunciatiu) system of Gascon, a system that is more colloquial than characteristic of normative written Gascon and governs the use of certain preverbal particles (including the sometimes emphatic affirmative que, the occasionally mitigating or dubitative e, the exclamatory be, and the even more emphatic ja/ye, and the "polite" se) has also been attributed to the Basque substrate.
  Gascon varieties
  Gascon is divided into three varieties or dialect sub-groups:
  Western Gascon, which includes Landese dialect and North-Gascon (bazadais, high-landese and bordelese)