Where I live, I sometimes run into second or even third generation Orientals, ones who were born and grew up here, that have a very distinct accent of their mother tongue. And growing up I would come across the same sort of thing with Italians. As long as there's a close knit community that still speaks the language of their original homeland, it's entirely possible for them to have a noticeable accent.

That's not even what I was talking about in the first place..

What I meant by Americans aren't naturally born with Russian accents is that Americans born by American families with American heritage and culture don't get Russian accents.

Actually, nevermind. This isn't going anywhere..

So what is an American? Americans all came from England fought their war for independence that's it? America lets in people from all over the world to be American. They have been since their was an America.

Dunkov could have come from an area where Russian or Ukranians came and settled. Bombs fell and they just stuck to their own. Same for Tenpenny, alot of English could have come to America before the Great war to escape the Wars in Europe. They never considered themselves American, bombs fell and they stuck to their own. It's possible.

You're right, your argument makes no sense at all. Of course characters like Dukov and Moriarity wouldn't have been born into American families with American heritage and culture. But that wouldn't make them any less American. Dukov could have been born into a Russian/American family that still practiced some Russian heritage and culture, and Moriarity into an Irish/American one. Just because someone leaves their homeland and sets up residence in the USA, or even Canada, doesn't mean that they will abandon their original culture and language. In may cases they will even pass on that culture to their children and grand-children. If you happen to have a Chinatown where you live, take a walk there some time and note all the people, even young ones, who are still speaking their original language. There's a number of nationalities that tend to gather together and maintain close ties with each other in order to preserve their heritage and language.

PS: Besides, you're thinking in terms of current American culture, a post-nuclear society would be quite different. There would be small pockets of survivors scattered all over the place, and if some of those survivors had been recent Russian or Irish immigrants, any offspring they may have had would naturally adopt the speech patterns of their parents.