One possible word is drawl.
People who cannot talk may be referred to as mute or nonverbal.
Therapist
Charlatans.
People with schizophrenia may talk a lot. If they talk a lot without making much sense, this is called "schizophasia".
autism
the word is shy
Conversing, conversation, dialog.
It's called communication. No talking, no communication.
talk slowly and do what you have to do to keep contact
An Elephant Called Slowly was created in 1969.
Telepathy
The duration of An Elephant Called Slowly is 1.52 hours.