By history and Americans where not around when smithing and making weapons by hand where done. Elder Scrolls has all the hall marks of an ancient game, there is nothing modern about it. American is a modern form of British English, change to suit modern America. 20th century things do not fit in this game and that's my point.
Here's what you are missing: None of the current accents on EARTH, ANYWHERE, existed back in that time. Not one. ALL accents evolve over time with language. Whether you are from London or New York or Tokyo, you do not speak like people spoke 500 or 1000 years ago. There is nothing "old" about any English accent, because they have evolved just as much as American accents have. The difference between the accents is purely geographical. They could hire 100% of their voice actors from Nordic regions and not one of them would sound like people from those regions did centuries ago. It is impossible.
No, I would want accents that are not modern. American accents in the game sound exactly like today's American accents, that's the point. Modern American accents don't sound right in such games and the kids in Skrim sound like that in Fallout 3 which are very strong modern American accents.
Again, every single accent in the world that is currently used is modern. On top of this, since it is a setting created by Bethesda, Bethesda gets to choose what an "authentic" accent is.