In Skyrim many nords did have accents you'd commonly hear in slavic lands of europe. Hard 'R' and pointy pronounciacion and whatnot.
They are Nordic accents. I hear alot of Faroese/Icelandic and German/Danish accents in the game, which Mark Lambert, Audio Director for Skyrim, also stated that that was what they were going for:
http://www.youtube.com/watch?v=QLnPwnJJcFQ
I don't know if they also sound Slavic, I have no idea, but they definitely went for a nordic accent.
And as for the Elves, I'm quite content with their british accents, but I'd like to hear more diversity - it's weird
how the only ones within Skyrim that rocks an accent
is from Skyrim. Everyone else (except the Khajiit) speaks perfect english...