Bustocco and Legnanese (natively büstócu and legnanés) are two dialects of Western Lombard, spoken respectively in the cities of Busto Arsizio ( Province of Varese) and Legnano ( Province of Milan), Lombardy.

Although there is little evidence of Ligurian settlements in the area, ^[2] they are widely thought to have been characterised by the Ligurian substratum. ^[3] While Legnanese is closer to the Milanese dialect,^{[ citation needed]} Bustocco is especially considered very similar to the modern Ligurian language, ^[4] for example for the frequent unstressed [ u] at the end of masculine nouns and other words is more frequent (e.g. Bustocco gatu "cat", secu "dry", coldu "hot", bücéu "glass", candu "when" = Legnanese gatt, secch, cald, bicér, quand), as well as the elimination of some intervocalic consonants (e.g. Bustocco lauà "to work" = Legnanese lavurà). In both dialects stressed /a/ sounds like a mix between a and o.^{[ citation needed][ clarification needed]}

A comic theatrical group called I Legnanesi uses Legnanese (with simplified grammar and lexicon heavily based on Italian) in its shows. ^[5]