If you're looking for a way to say something in a nonsensical way, you could try:
* Using made-up words: "She said, 'Blorp, flibberty, snargle!'"
* Repeating sounds: "She said, 'Blah blah blah, woo woo woo!'"
* Speaking in a different language you don't understand: "She said, 'Hola, como estas?'"
Remember, these are just ways to make something sound nonsensical, but they don't actually represent a real language or meaning.