From The Guardian, a denomination-of-origin issue, akin to what happened with Champagne et al.
QuoteIsmael Álvarez de Toledo, president of the Spanish Brotherhood of the Manchego Cheese, is adamant that there is only one product worthy of the name – and it is made from the milk of sheep in the region of La Mancha.
“[Mexican manchego] is an insipid cow’s milk cheese that sometimes doesn’t even look like a cheese because it sometimes comes in slices for making sandwiches,” he said. “The only thing it’s got in common with our cheese is the name. But it’s a fake name.”