Western Lombard is a group of varieties of the Lombard language, a Romance language of the Gallo-Italic subgroup. It is spoken primarily in Italy and Switzerland. Within Italy, it is prevalent in the Lombard provinces of Milan, Monza and Brianza, Varese, Como, Lecco, Sondrio, and parts of Cremona (excluding Crema and its immediate surroundings), Lodi, and Pavia. In Piedmont, it is spoken in the provinces of Novara, Verbano-Cusio-Ossola, the eastern area of the Province of Alessandria (around Tortona), and a small part of Vercelli (Valsesia). In Switzerland, Western Lombard is spoken in the canton of Ticino and part of the canton of Graubünden.
Due to its historical association with the Duchy of Milan, Western Lombard is frequently referred to as Insubric (from Insubria and Insubres) or Milanese. The term Cisabduan ("Cisabduano", literally "on this side of the Adda River") is also used, particularly in linguistic contexts, following the terminology introduced by Clemente Merlo.
