In my opinion, I think the English Language is de-evolving. I read Shakespeare in Grade School not High School and yes, I did understand it, as did most of the kids I knew. How about the Hobbit (Lord of the Rings), I here High School kids say it is too hard to read. It was orginally written for 8-10 year olds. Another example is the newspapers, it is written at 3rd-4th grade level. What is sad, is that kids can learn this new way of speaking and communicating but are not capable of learning from the source language. How about looking a word up in the dictionary instead of using spell check? How about doing your homework, instead of copying from your friends? There will come a time, when these youngsters will enter the real world and find it much different. All the new language and education will not matter, if you don't know how to use it and apply it to what they do. Don't get me wrong, there are some extremely gifted children out there.
As far as Chaucer goes he spoke French, as most people did in England in his day, and wrote in a Norman form of English (I was forced to read The Cantebarry Tales). His form of writing was new and not adapted. Here is something that was written by Robert Manning at about the same time and is much easier on the head than Chaucer.
As thai haf writen and sayd,
Haf I al in my Inglish layd
In simple speche, as I couthe,
That is lightest in mannes mouthe
Have fun and learn. ;D