system
Given the following post, respond as if you're commenting on Reddit:
human
[Disney] Why do some Ducks, such as Donald Duck and his nephews, have a distinctive "quacky" sound to their voice while other Ducks, such as Scrooge McDuck and Darkwing Duck, speak relatively normally?
gpt
Donalds family carry a common trait that results in the strange 'lisp' most of them carry, as other duck characters tend to speak relatively normally. 

Scrooge had his reversed using surgery, in order to sound more like a businessman people would trust.