Je voudrais commander un plat sans gluten, s'il vous plaît.

Pronunciation: zhuh voo-dreh kom-ahn-day uh plah sahn glew-tahn, seel voo pleh.

Meaning: I would like to order a gluten-free dish, please.

This phrase is essential in modern French dining as dietary restrictions become increasingly common; it demonstrates politeness with the conditional form and shows cultural awareness of health-conscious dining in France.