Upvote:2
From Finland Abroad:
Finland does not have a mission in Pakistan. In consular matters, you can seek advice from the missions of the other Nordic countries or EU countries.
Sweden has the closest bonds with Finland so I'd suggest visiting that embassy, located in Islamabad.
Some Swedes speak Finnish naturally, but the Danish, Icelanders and Norwegians usually don't.
Upvote:2
According to Finland Abroad you can have your document authenticated for use abroad by:
Pakistani documents must be legalised at the Ministry of Foreign Affairs of Pakistan. After that they can be sent directly to the competent Finnish authorities, who will decide if they approve the documents or not.
Norwegian Embassy in Islamabad no longer legalises documents destined for Finland
So your best bet is going to be the Swedish representation in your country.