British Airways sees customers from all over the world traveling from location to location. Because of this, being well-versed in another language is always a plus for your interviewer to be aware of about you. While certainly not a make or break question for you during your interview, your interviewer is simply looking to know if you do speak any other languages, as that would be a major asset to their flight operations team. Be honest as you answer this question and don't hesitate to say that you are open to learning any new languages that may help you be a step ahead in this role down the road.