K.P.
I dont think you should be too concerned. If she seems rested during the day, and isnt crabby then she is just a sleep talker. I remember my sister used to talk all the time. I could have conversations with her all the time.
She doesnt do it as much now that she is older, once in awhile but I think she will grow out of it.
If you still have concerns then you can always talk to her doctor and see what they have to say, just to ease your mind.
Now if its your sleep you are wanting, which who could blame you haha, then try giving her a cute notebook and a pen, and when she wakes up then instead of waking you up she could write down her dreams and then show you at breakfast. That way you get more sleep, and you are in a better state of mind to analyze her dreams.