The French believe that kids feel confident when they're able to do things for themselves, and do those things well. After children have learned to talk, adults don't praise them for saying just anything. They praise them for saying interesting things, and for speaking well.
Pamela Druckerman (2014). “Bringing Up Bébé: One American Mother Discovers the Wisdom of French Parenting (now with Bébé Day by Day: 100 Keys to French Parenting)”, p.158, Penguin