¡Buen provecho! / ¡Provecho!

So, buen provecho just means enjoy your meal, a bit like the French bon appétit. BUT it’s used a little differently from the English. I mean, in English you’d expect a server to say enjoy your meal, right? But probably not your fellow diners. And that’s the key difference. Buen provecho is often said to your fellow diners when you’re LEAVING a restaurant, taco stand, etc. Now, it’s not without its controversy! Some people find it a bit annoying because it usually requires a response while you’re eating. And that ain’t always easy with a full mouth! But there’s a workaround (yippee!). If someone tells you buen provecho and you’ve got a mouth full of carne asada, well, all you have to do is raise your hand to about head height (kinda like a Mexican military salute!).