As regular readers are already aware, I am bilingual, speaking both English and French. My mother, a language teacher, began speaking French with me earlier than I can even remember and we have been speaking it together ever since. I lived and studied in France for six months during my junior term overseas. I have not kept up my French as much as I would like, but you will still catch me speaking it -- in fact, there are some things I say more automatically in French than in English! Such as:
Quelle heure est? -- What time is it?
Qu'est-ce que c'est? -- What is that?
Qu'est-ce qui ce passe? -- What's happening?
Quel jour! -- What a day!
On y va! -- Off we go! (or, often when I am in heavy traffic: let's GO!)