The boy's vocabulary seemed to grow a bunch while we were back in the States. I don't know if it was just the timing, or being out and about more, or what. A couple of the words they learned were "boy" and "girl." For the most part they started to identify who was a boy and who was a girl. Connor had (and still has) his own special way to say "girl."
“A vocabulary of truth and simplicity will be of service throughout your life” ~ Winston Churchill