In most countries, it is illegal to call sparkling wine by the name "Champagne" unless it was produced in the Champagne region of France. Champagne is a protected designation of origin (PDO) that refers specifically to sparkling wine produced in the Champagne region using specific grape varieties and following traditional production methods.
The term "Champagne" is legally protected to prevent misleading consumers and to preserve the reputation and authenticity of wines from the Champagne region. Sparkling wines produced in other regions or countries cannot be labeled as Champagne, even if they are made using the same method or have similar characteristics.
Instead, sparkling wines produced outside the Champagne region are often labeled with names such as "Sparkling Wine," "Cava" (from Spain), "Prosecco" (from Italy), or "Sekt" (from Germany), among others, depending on their respective regions and production methods.