Elise Olmstead's Radio Equipment

Origin
Elise Olmstead was the wife of Roy Olmstead, a famous bootlegger. She would use the equipment to broadcast bedtime stories via a private station, KFQX Radio. The stories were suspected to have secret codes for bootleggers.

Effect
When someone uses the equipment, anything they say will be translated into a secret code. Only those that best know the user will be able to understand the code.