Last night Will and I were talking, while Jaan seemed to be playing and just minding his own business. All of a sudden Jaan yelled, "Нет! Нет! Собака не горячая!" ("No! No! The dog is not hot!") Huh? And then we realized that Will had just mentioned hot dogs, and we started laughing. So he does understand English! (By the way, one of Jaan's favorite books right now is Go, Dog, Go, which he calls "Go, Собака, Go.")
And as for Raia. . . I'm finding hair training to be much harder than potty training. She does not want to keep barrettes or anything in her hair, but her bangs are so long that I have to do something. The moment I look away from her, she has her hair loose. We're making progress, though. By the end of yesterday, she would reach for her head, then start to shake her finger like нельзя/no-no. She also started using that to say "no" to me, though! Last night she didn't want to go to bed, so as we approached her crib, so she told me "нельзя."