Champagne

Asti Spumante is what the Italians call what used to be called "Champagne".

The use of the word "Champagne" was banned under the Protected Designation of Origin.

Champagne simply means a white wine msde using a particular bacteria which, when controlled, begins to generate gases inside the bottle as the wine ages over a period of at least 15 months.

The name Champagne refers to the region where it's produced, nothing more.

Spumante is exactly the same thing, but European law doesn't allow it to be known by the French name, since the vineyard are in Italy, not in the Champagne region of France.

Too much fussing over it.