Why don’t you try it? Start by lying down on your back, try a curl up with the tongue relaxed and then pushed to the roof of your mouth and see if you can feel a difference in how the neck feels.
Interestingly, research has shown that tongue position could also influence the strength the legs by as much as 30% in some exercises. You can read the full post on this here. It is worth a read.
Next time you are doing exercises or are just in a weird position that is putting stress on your neck, try this simple body hack. Your body will thank you for it.