I don't know what response I expect, but if I haven't seen Watchcat Collette for several hours, I'll say, "Good morning (or afternoon or evening), Collette. How have you been?"
I know I won't be able to translate her response exactly, but the urgency or lack of urgency in her meowing will at least clue me in that she's hungry, feisty, or lethargic.
Besides, even though we don't speak the same language, it's just respectful of us to say, "I see you there," in our own ways.
