Not many details to your question so difficult to guess what you are searching for. Is the Basque language forbidden? Are there players in the 1st team who speak it or even at all in the cantera or among coaching staff or employees?
Otherwise it's an odd line of questioning about a Catalan club, might as well pose that to Athletic about Catalan etc
I am only curious not speaking any of those 2 spanish/basque .... Why do you think it is an odd question?