grammelot

It is from him, from Beolco Ruzzante, that I've learned to free myself from conventional literary writing and to express myself with words that you can chew, with unusual sounds, with various techniques of rhythm and breathing, even with the rambling nonsense-speech of the grammelot.

Dario Fo - Nobel Lecture 1997

Translating Fo's texts with their topical references and use of grammelot the jesting language that Fo has developed based on dialect and onomatopoeia offers particular problems.

Nobel Prize for Literature 1997 - Press Release 1997