多此一举的英语:make an unnecessary move; bring sth. of which there is plenty; burn daylight; carry [send] coals to newcastle; fan the breezes; knock at an open door; take a superfluous action; the action...
多此一举的法语:faire un travail superflu;porter de l'eau à la rivière何必~?pourquoi se donner la peine de faire ça?