Allergyaction.org offer free, printable translation cards.
Food-info.net provide a free translation dictionary for over 200 allergy-related words in all European national languages and other world languages. These will help to ensure others are made aware of your allergy despite any language barriers.
ALK, the manufacturer of the adrenaline auto-injector Jext have produced their own phrase sheets providing translations in a range of languages for key phrases that you may need when abroad. These can be downloaded here.
Additionally, there is a Jext app which also provides these phrase sheets to help you during your foreign travels. Please find more information about the Jext app here. Please note that you do not need to be prescribed a Jext adrenaline auto-injector device to use the phrase sheets on their website or app.