Do You Speak George? & World Girls

Do You Speak George?: The gang have split into groups who all have their own special, made-up language. Muffy and Francine refuse to let Arthur and Buster learn their language, so the pair decide to make up their own. George wants to learn their language, but struggles, and therefore tries to invent his own language. The ensuing confusion convinces everyone that their original language is the most practical.
World Girls: Muffy has become obsessed with World Girl Dolls. Each doll is dressed in the national costume of a particular country, and comes with accessories related to that country- there is also a book accompanying each doll. Sue Ellen is interested in purchasing an accessory for her doll, but when it goes out of production, she decides on another solution.