"I am a boy."
Translation:Minä olen poika.
Yes! :-) There are about a gazillion Swedish loan words in Finnish, and this one very common Finnish loan word in Swedish. (Plus a couple of others: https://sv.wikipedia.org/wiki/Kategori:Finska_l%C3%A5nord)
I think the usual word for boy in Swedish before this one was (the still existing but now pretty old fashioned) gosse, which is a loan word from French...