When you go to buy food, with products have list of ingredients by Finnish and Swedish (as they are official languages in here) but also they may be by English. If there isn´t list by English, here is some information you should notice:
Gelatin is by Finnish as
liivate. It´s mostly made by pork in Finland.
If some food includes animal fats, producers don´t have to tell from which animal it comes so it also can be from pork (eläinrasva or eläinrasvat by Finnish).
Pigged parts of the pork are not always referred to as the word "sika" or "sianliha" or "porsas" or "porsaanliha" (sika = pig, porsas = piglet, pork). Therefore, it may be good to know what names are used. They include for example: kassler, kotletti, kinkku, potka. Also "ihra", "silava", "läski" and "kamara" are normally from pork.
If in some product has alcohol as ingredient, then there has to be information about it. In some cases there also may be just information as what kind of alcohol there is like
punaviini, konjakki, arrakki, punssi etc.
Alcohol can sometimes be used in small quantities to emphasize, for example, certain flavoring substances before they are added to the food without it being reported in the list of ingredients.
Same also if there is blood, there has to be information about it (
veri by Finnish, also sometimes "sianveri" or "sianverta" = pork blood).
About E codes, there are some Finnish food producers whose have informed they use mostly
herbal additives in their products (Fazer, Valio, Ingman). Also, if you for example like ice cream, then ice creams from those companies should to be halal.
Hopely that helped you a little.