Sleep talking... what is going on?

A lot of people talk in there sleep. The only way you are going to know you do it is if some one tells you. I have conversations during sleep. My 5yr old and 3yr old talk in there sleep. And the fact that you were speaking full sentences in the language that you are currently learning means you know more of that language than you remember. When you go to sleep it give your brain time to reboot like a computer when you make system changes it may need to reboot to fully accept the changes you made. Like learning during sleep you work on problems you are still processing new information verbalizing this process is in my opinion nothing to worry about unless you start feeling excessively fatigued through out your day.