Sondrio is an Italian city and comune and Provincial Capital located in the heart of the Valtellina. As of 2012, Sondrio counts approximately 21,876 inhabitants (2015) and it is the administrative centre for the province of Sondrio. In 2007, Sondrio was given the Alpine Town of the Year award.

The Lombard language belongs to the Gallo-Italic group within the Romance languages and is characterized by a Celtic linguistic substratum and a Lombardic linguistic superstratum and is a cluster of homogeneous dialects that are spoken by millions of speakers in Northern Italy and southern Switzerland, including most of Lombardy and some areas of the neighbouring regions, notably the far eastern side of Piedmont and the extreme western side of Trentino, and in Switzerland in the cantons of Ticino and Graubünden. The language is also spoken in Santa Catarina in Brazil by Lombard immigrants from the Province of Bergamo, in Italy.