I live in Norway but I dont speak the language ... I bought Parasite and the subtitle is only for Nordic counties ... what should I do?

You can contact the iTunes Store staff. See what they can do for you. iTunes Store - Contact Us - Official Apple Support

Check available subtitles for a movie title before committing to a purchase.

‎Parasite (2019) on the iTunes Store (NO)

Unfortunately, supplying studios may cater to the largest groups in a region, and may not include subtitles for everybody. Each studio can make different decisions for each individual title.