Ah, in French, you can say "de rien" to mean "you're welcome." It's a simple and casual way to reply when someone thanks you. Another option, a bit more formal, is "je vous en prie" or "je t'en prie" for informal contexts. Do you often find yourself needing to use French phrases? Or is there a particular reason you're interested in this one? I'd love to hear more about your French connections!