It's true. It is all Snooki's language. But you should know that in Snooki's language, the word "language" means "vomit." So when you buy the book and see all the guidos in Snooki's language on the first page, you'll know it's her.
Later on in the interview Matt added a new word to his vocabulary.
That's true he doesn't call it that. He just calls it a "Roker."