Why not? Does it sound hard or something?
I can listen to someone speak in another language and write in english at the same time, easily. A part of how I was able to learn multiple languages was translating what people were saying as part of the lessons. We would listen to audio tapes and transcribe it into english, turn that in for homework.
I'm guessing it might be the same thing that goes on for interpreters who may translate someone's sign.