Originally Posted by
grandpa1
Champagne has to be French by law
These laws go even a bit further, it's not only about France, it's also about the Champagne region and the rules of the appellation.
Some use the term Champagne as a generic term for sparkling wine,but in most countries, it is illegal to officially label any product Champagne unless it both comes from the Champagne region and is produced under the rules of the appellation.
https://en.wikipedia.org/wiki/Champagne