Many of the people in the Netherrealm and the Chaosrealm sound like they're talking gibberish, but are actually speaking backwards. In fact, the actual spoken quote for each person does not match what is being said. Examples of what some of these characters are saying include (but not limited to):

"There are many realms,"

"I am talking backwards - spooky, isn't it?"

"Parents of the world, there is no satanic messages hidden within the backward speech of Mortal Kombat."

"John Vogel is a genius."

John Vogel is a Mortal Kombat developer.