USING SPANISH IN FRANCE...OOPS

Today at the local bakery, i accidently said yes in Spanish instead of saying it in French. I am so used to everyone back home saying yes in Spanish that i slipped up and said si to the nice lady instead of saying oui. It was pretty funny. But i did learn that the French do say si si when they are trying to contradict someone in an arugument. Thank you Madame Faur!!!