My husband has talked in his sleep, not very coherently, sometimes in English, sometimes in Spanish. When he's spoken in English, I've asked, "What?", initially because I thought he was talking to me. He would wake up. When he's spoken in Spanish, I've asked, "Que?" He would wake up.
THE MAN NEVER HEARS ME TALK TO HIM WHEN HE'S WIDE AWAKE, BUT WHEN HE'S ASLEEP, MY WHISPERING WAKES HIM UP?! WTF?!