For diners coping with a nut allergy or another medical condition necessitating a strict nut-free diet.
The translated wording on these cards is:
Dietary alert card
I have a life-threatening allergy to all nuts, all nut products, peanuts and all the derivatives. Can you assist me in making my choice from your menu? Please alert me if a food, sauce or garnish contains these ingredients or may have been contaminated by them during preparation.