@Howard Johnson
Which national language can you tell me?
Please don't tell me Catalan
Aside from Vueling most of the other big players at the airport will certainly not have Spanish, let alone Catalan, as their principal language.
EZ, RYR etc..
There are flights from several U.S. airlines and many more besides
Given the numbers of non Spanish speaking airlines now basing a lot of flights out of BCN not speaking the international language of aviation is inexcusable.
Put it this way, would Cardiff airport be speaking Welsh?