Must have observed americans then as the american accent probably has more of a where than wire to it i think.
Well, Imperials do sound pretty American, so yes. They did learn from Americans to an extent. Only, from Imperials. They learn things through observation, which is how they learned just about everything that wasn't already known to their culture. They are masters of mercantile and have a huge part of that from their own culture. They probably could invent a Wal-Mart faster than an Imperial, in fact. If the caravans were allowed in cities and people noticed how good the selection of stuff was, they could have ended up getting a trade deal with Skyrim.
I love me some Khajiit lore.
I know the people of Tamriel don't speak English. It's just what we hear. Khajiit did learn the more dominant language through observing, still. It is Tamrielic, I believe.