I too love language and I take special notice to small changes. For example, fun. When did the usage of "funnest", "that's so fun", etc come into play?
We old timers used to say "that was so much fun". Fun alone just does'nt sound right.
Back in the Eighties, Robert Macniel did a documentry, "History of the Story English"....fascinating stuff.
The Story of English | Watch Free Documentary Online