Talkative Cat

Several nights ago, I was sleeping with cats on either side of my head, listening to Hemi-sync Supersleep (subliminal binaural beats under the sounds of ocean surf) repeated continuously after a healing yoga nidra track had played first. I had on headband earphones for comfort. I was dreaming about a class at a university that someone I know was taking on electricity. I was explaining to a man in the dream that she was not taking the basic class, which is in a large lecture hall with a couple hundred students, but a more involved and advanced class with only 3 people in it. He said enigmatically, “Electricity is the life spark (or life current) of the Universe.” Then suddenly I was in the electricity class as a subject of an experiment with electrodes on my head (possibly because I had earphones and a sleep mask on in the waking reality). I began to hear someone talking behind me in a strange language. I realized from within the dream that this speaking is not within the dream and I had better wake up fast. I was very alarmed. Who was speaking behind my head? Slowly I realized it was Sylvie the cat. I was very relieved. Stupidly, because I wanted to go back to sleep, I quieted her down. I should have listened and encouraged her, maybe recorded her.
This is the third time this has happened in some form. She seems to be a sleep talker. Odd thing is, she seems to be speaking a language she does not speak in her waking life. It is not little growls and purrs and meows. No, it is syllables with sounds she ordinarily can’t produce.
Sylvie is 15 1/2 years old now and very youthful. The first time it happened was a number of years ago, probably at least seven. Another cat, now deceased, was also there. I was in a state of sleep paralysis, aware of my surroundings but unable to move and vibrating pretty violently. Sylvie was on my chest, sitting with bent elbows talking into my face. I understood what she said at the time but could not remember later. Second time it happened was perhaps a year ago and I was wide awake in bed. I was flabbergasted. She was asleep then, speaking the same odd language she did recently.
I know that animals dream. Both she and other cats and dogs I have known have showed signs of it, legs twitching like they were running, perhaps mewing softly. This is different. She is definitely trying to articulate sounds which she is otherwise incapable. I have lived with many cats and three dogs over the course of my life and no other animal, save one dog, who kind of barked “mama” when coaxed, has ever spoken.
I’d like to record the syllables Sylvie speaks but it happens so seldom it would be hard to catch. I wonder if she is being possessed by a discarnate being. I’d like to hear from anyone with a similar experience.

Addendum: I recall receiving information in the past, retrieved through meditation that cats, specifically felis domesticus, led other existences during their copious sleep-time in our physical realm, so this is a possible explanation.