Yes. But, their responses are controlled by your own brain, so their responses are only as accurate as your knowledge of the person.
Certain dreams can incorporate such conversations, yes. This kind of phenomenon would occur in the REM (rapid eye movement) phase of sleep.
The dead do not sleep. They no longer have bodies... So, sleep is no longer required. If you want to speak to someone who has passed... Do it the same way that you would with someone who is living. Talk. They can hear you.
Yes you can sleep talk in other voices.
Talk
The Dead Sleep Easy was created in 2008.
No sleep talking is perfectly fine 30% of people sleep talk but very few know about it
you talk to it in your sleep
I Can Sleep When I'm Dead was created on 2008-02-04.
Sleep When I'm Dead was created on 2008-07-13.
parler dans votre sommeil is the translation. This is the translation of talk in your sleep.
Talk - 2013 Sleep Talk 1-4 was released on: USA: 6 September 2013
The Dead Talk Back was created in 1993.
Dead Fingers Talk was created in 1963.