betonente, I'm answering you in English because my French is on a par with yours ;)
Cilantro is an herb which is often used in various Mexican salads and other dishes. It looks a bit like parsley but has a very distinctive (and good) flavor. It adds a special tang to salads, especially with lime juice, as Big D suggested. A natural flavor combo. Don't know if it would make a good snuff, but I'm willing to try some if they come up with it!