Insubric language

Western Lombard is a Romance language spoken in Italy, in the Lombard provinces of Milan, Monza, Varese, Como, Lecco, Sondrio, a small part of Cremona (except Crema and its neighbours), Lodi and Pavia, and the Piedmont provinces of Novara, Verbano-Cusio-Ossola, the eastern part of the Province of Alessandria (Tortona), a small part of Vercelli (Valsesia), and Switzerland (the Canton of Ticino and part of the Canton of Graubünden). After the name of the region involved, land of the former Duchy of Milan, this language is often referred to as Insubric (see Insubria and Insubres) or Milanese, or, after Clemente Merlo, Cisabduano (literally "of this side of Adda River").

In Italian-speaking contexts, Western Lombard is often incorrectly called a dialect of Italian. Western Lombard and Standard Italian are very different. Some speakers of Lombard varieties may have difficulty understanding each other and require a standard to communicate, but all Western Lombard varieties are mutually intelligible. Western Lombard is relatively homogeneous (much more so than Eastern Lombard language), though it does present a number of variations, mainly in relation to the vowels /o/, /ɔ/ and the development of /ts/ into /s/.