"Somniculous" Natural Recordings by Native Speakers
That's not a word in the English language. It appears to be a made-up or nonsense word, often referred to as a "non-word" or "porter meaningful word".
Moving or acting mechanically while asleep; involving or characterized by somnambulism, a condition in which a sleeping person gets up, walks around, and performs actions without being consciously awake.
Somniloquence refers to the act of talking or speaking in your sleep. It is a rather rare and technical term that is often used to describe a sleepwalker who is able to speak coherently while asleep.