We went to the doctor the other day to get a letter for a medical condition so that the airline wouldn’t give us a hassle flying the US.
He was super nice and wrote the letter for us. I had a look at it, and, surprise, he had written the thing in Catalan.
He got a bit confused when we told him that a letter in Catalan wouldn’t really be very useful for us since no one outside of Catalunya would be able to read it.
In the end we managed to convince him to write it again in Spanish.