Oh .. I learn something today, Thank you. In France, we use to say : "le secret de polichinelle" for saying an "open secret" :)) which refers to something which is widely known to be true, but which none of the people is willing to categorically acknowledge in public. Well, like the puppets, wayang and guignols, they are often used for caricature, and comedie-politique.
The most famous marionettes in France name Guignol from Lyon. Perhaps it is like " Si unyil" in Indonesia.
