Hum, the official policy would be "by default in Catalan". Then they would probably insist in Spanish because, you know, you're a foreigner and we still have interiorized a severe inferiority complex about our language.

Anyway... Què fer would probably sound like "café", despite it's a different sound :)

Ah, something my bf says
"Què farem"... "Mala cara quan morirem"... "Però no ens n'enterarem"