I think one rarely makes sense talking in one's sleep :-) I know my roommate sat up once looking for her "chain" when I was in college :-) and last Spring I was in a stressful week-long school meeting in a hotel with a before-then-unknown fellow student roommate and she said I was mumbling in my sleep about Venezuela, which was the topic I was stressed about :-) I can imagine that someone would mumble/talk in their sleep and not make a lot of "sense" to the hearers. I don't know that I would decide that was speaking in tongues, one reason being there's not a whole lot of people around to hear it (almost nil chance of getting an "interpreter"?) so there's no point. God rarely :-) does nonsensical things, I think. Sweating and mumbling in your sleep lead me to believe you're having a nightmare-type struggle rather than trying to "bless" your hearers :-)