My son's first word? What do you think?

I think he's gonna surprise you one day when he starts talking up a storm. He's probably got all sorts of words in his brain but he isn't quite ready to let them out but when he does, I'll bet they'll come fast and furious. Sounds like he is very curious about the world around him and he may be more interested in absorbing right now. But I think one day the dam will break and he'll be your little chatterbox. It's amazing how all babies are different. And speaking to him in two languages is beneficial not hurtful as another person implied. Good luck!