“Pull someone's leg”in other languages

Same idea, different pictures

English pulls a leg, and Spanish takes the hair, tomar el pelo; Welsh plucks a hair from the nose, tynnu blewyn o drwyn, to get a reaction. Nobody can say for sure where any of the three began.

German ties a bear on you, jemandem einen Bären aufbinden: a tall tale you're meant to carry around. French treats itself to your head, se payer la tête de quelqu'un, which is closer to mocking.