Thank you for your response! I will take that into consideration The thing is that the character stutter since his childhood ; I think that I mainly "make" him stutter when he's stressed to make the dialogues more fluid, but it's true that in that way it's kind a makes the character sterotypical if he stutters just at certain moment. So I imagine, either he stutters all the time (and some times more than usual) or he never stutters.