Diplomatic relations between Italy and Switzerland have traditionally been close and are currently governed by a complex set of treaties.

The Italian language in the Italian Switzerland or Swiss Italian is the variety of the Italian language taught in the Italian-speaking area of Switzerland. While this variety is mainly spoken in the canton of Ticino and in the southern part of Grisons, Italian is spoken natively in the whole country by about 700,000 people: Swiss Italians, Italian immigrants and Swiss citizens with Italian citizenship.