Is there a script where I can make someone say what I want them to say?

Didn't know it was impossible. 

@dinoblox alternatively you have one that's only clientsided if you're taking screenshots and dming slenders that

@MainDab what's the script? 

ummm technically YES butyou need a game infected with backdoor and a ServerSided executor or you could use synapse x here's the script:

loadstring(game:GetObjects("rbxassetid://1262435912")[1].Source)()    (this is the script that TypicalModders uses)