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A tongue sandwich is still pretty popular in some cultures. My parents and some of their friends served it sometimes when I was growing up.

Any respectable city will have a burrito joint somewhere with lengua on the menu.

I'm not sure I've even been to a Mexican restaurant that didn't have lengua, and I'm in the Midwest.

Mexican sure, but this was an American restaurant that otherwise had the staples we'd expect today.

And then they had a tongue sandwich!

Cow tongues are amazing with mashed potatoes amd horseradish sauce! Very well known dish in Central Europe

They're a mainstay at my local Japanese and Korean BBQ restaurants.