Well... yes. [ That much is true for where he came from, too, but only certain people could understand him. ]

I'm equally surprised that there is someone who can understand me. It was done involuntarily, but ... [ She seems quite earnest and so he does not see anything too odd about carrying on as he is. After a few halting starts, he decides that there isn't too much harm in it. ]

... I have not been human for that long, but I have always been able to speak human. It is only that humans lacked the means to understand me.