Mini-Me has almost no spoken dialogue in the films beyond an occasional frightened "Eeeee!". Otherwise, he is silent except for when he does his evil laugh with Dr. Evil. He also likes to lip sync the occasional line when Dr. Evil raps. At the beginning of Goldmember, Dr. Evil asks him to "Use your words like a big boy clone!". At one point, he asks Dr. Evil to hug him after meeting Fat Bastard, who wants to eat him. Mini-Me often uses the middle finger as a means of insulting someone (even though he only uses it once during the third movie). On most other occasions, Mini-Me prefers to express himself through written notes.
This page contains all information about Mini-me.