Tongue was a common food in US up to the 60s. We had it occasionally. Could be tough.
Depends how its cooked. I use it for tacos/burritos. Very tender.
When I was a kid I had beef tongue for dinner, at least once.
Back in the 60s, the supermarket meat counter still had a diagram of the whole steer posted on the wall behind the counter, and "variety meats" were still sold and consumed. We would also have beef liver on occasion.
Love lengua tacos.