can i make somone say something in there sleep

It's not possible to control a person's actions or words while they are asleep. Sleep talking, or somniloquy, occurs spontaneously and is typically not something that can be influenced or manipulated. If you're interested in sleep talking in general, it can occur due to various factors such as stress, sleep deprivation, or certain medications. If you have specific reasons for wanting someone to say something, it might be more effective to communicate with them when they are awake.