You had to ask if Ghosts talk. Well, ghosts don't go 'Boo' in the night, if that's what you mean. We just think they do. When a ghosts speaks it's all done telepathically.
I've always been under the impression that ghosts talked to people but apparently I'm wrong because they have no physical body to actually manipulate molecules and sound waves to create sound, hence ghosts do not talk to people in the same way we speak to one another but they do communicate with us by talking to us telepathically, since they are nothing but sheer energy. They also can convey those messages telepathically to sound, uncannily like the original person did when they were alive to the person that heard them.
So, to answer the question, Do ghosts talk? The answer would be a NO, physically and Yes telepathically.
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