Sometimes it makes it worse during the trip but you forget about ik quickly and then it turns back to being able to speak fluently, for me at least. I dont really have a problem with talking with my friend that are also tripping. It gets trickier when i have to someone sober tho so i wouldn't recommend it, especially not if its your first time trying acid. Of course there is the set and setting you have to be careful with but other than that, stuttering shouldn't be a problem :). Enjoy your trip!