Regarding to how allergens should be labeled, in the case of nuts, the specific type have to be indicated in the list of ingredients. Where ingredients or processing aids derived from nuts have been used, the ingredient has to be indicated with a clear reference to the specific name of the nut.
Commission Notice of 13.7.2017
https://ec.europa.eu/food/sites/food/files/safety/docs/labelling_legislation_guidance_allegens-2017-4864_en.pdf