There was just a piece on the radio here---NPR---about this subject and it was quite interesting. I guess if you go to www.npr.org and look for All Things Considered you can find it.

Interestingly, there is a place here in the U S---Smith's Island where the native people speak in Elizabethian dialect still.   It is off the coast of Maryland in the Chesapeake Bay area. Written up in National Geographic many years ago.   I went there a while back by the only transport to it (other than private boat)the daily mailboat.
Inteesting place that is peopled by fishermen and crabbers and has only one small boarding house---then anyway.

Bill Hahn