I'm making a giant assumption, but I wonder if she would be able to have a musical discussion with a MD or musicians who actually know what they are doing.
Probably not but with the right MD it shouldn't really matter. Obviously the closer your languages are to each other the more intuitive the process can be, but there are a huge amount of successful musicians out there with very little theory knowledge and an MD with good communication skills should be able to translate "can you put a baadafaffa bit in there?" into actual instructions for the band. Turning vague lumps of dust into solid gold is why they get the hazard pay...
