I like free stuff.
Anyone traveling in another country with food allergies should know about food allergy cards. Allerglobal lets you create your own personalized card. For free. Simply check off the allergens from the list and choose from over 25 different languages.
Even if you're not traveling, it's pretty cool to learn how to say or read your allergens in common languages. "Amendoim" is "peanut" in Portuguese.
Go ahead, play around with it!