I know I've implied that the Monkey has already spoken his first word (and doesn't he make "dah!" do a lot of work??), but really, for truly really this time, I think we might have a genuine, actual first word.
It is .. (drumroll please!) ... "dzzzzzzzz" or sometimes "thzzzzzzzz" /ðzzzzz/ for you linguini types.
The Google translate page for Monkey > English was down, but Hubs was on the ball. Houston, we have "juice". I repeat, we have "juice"!