Corrected entry: Minnesotans don't actually talk like that. In the movie they use accents on some words that they don't even say very often (e.g. Ya shore, you betcha.) Nobody says that very often. It's a Norwegian term, but it's rarely used. The only accent they have is the Mid-western one that everyone around there has, unless you're Hispanic or have just moved from another country.
Correction: Apparently, while it IS exaggerated in the film, it's more accurate than not.
Correction: Those examples are just Upper Midwest pronunciations of "You bet" and "Yeah sure" - not Norwegian, but common English words and expressions.
Corrected entry: I live in Fargo. There is so much wrong with this movie. First nobody here talks with that accent. We speak perfectly normally. I don't know one person that says "ya sure ya betcha" or anything remotely close to that. Second, the biggest of all, a huge majority of the movie was not even filmed in Fargo. It was mostly filmed on a rural stretch of interstate between Fargo and Minneapolis, and in a small little city off the interstate that barely looks like anyone lives there. Fargo is a large city, nearly 100,000 people. The movie is not true, but some like to think it is. And please quit thinking Fargo is in Minnesota. It is in North Dakota, a state on it's own, not Minnesota.
Correction: The film is called "Fargo". Apart from the first scene, it takes place elsewhere, which is made quite clear. Why did the Coens call it "Fargo", then? Probably because it sounds better than "Brainerd"...
Dude, it's a movie made for entertainment. Accents are exaggerated in many movies for effect. Movies based in Boston, Texas, etc., all have exaggerated accents. Don't take it personally; movies aren't real life.
Correction: My ENTIRE family is from Minnesota. They absolutely speak like that. Although, it is exaggerated in the film, the accents are accurate.
I don't get it. Regional accents are typically exaggerated in movies. It's called entertainment. In most Boston-based movies (Good Will Hunting, Departed, The Fighter, Ted, Spotlight, and many more), accents are ridiculously exaggerated; it adds to the ambiance of the movie. Seriously, don't take it personally. Bostonians don't.