Finnish and Polish food? Forget it, you can't find it here...
God knows I've tried.
There's some Swedish food at IKEA (more than just meatballs and
salmon) and at Fika.
English and Irish dishes can be had at some pubs (Muddy's, Penny
Black, Molly M) at lunchtime.
Mexican food is out there but it's not at Taco Hell. 
i just had some last weekend... and yeah.. it's not at taco hell..
that's horrific...
Margarita's serves a mean margarita 