Parkour was something that he did speak quite well, from months and months of practice in the streets of Gotham. One had to keep up with the thieves and muggers of Gotham somehow, and he wasn't as young as he used to be. The injuries start to pile up, after a point.
There are a few things that Vic never considers, due to the masks that he wears. He forgets that he does have a few minor tells in his body language. His breathing, the way he walks, at times. Most people can't pick up on that, but Batgirl may just.
The next movements that The Question makes, after her 'find out' gesture, speak a dual language. They are the words of a street fighter and a trained martial artist. Skill laced with passion, flowing water with bits of rubble in it. He feints high with a right, before attempting to come down with a solid left blow to the ribs.