Sounds like the UK...

20 miles in either direction and we have a different dialect...
I read in the newspaper last week I think, that people in
Cornwall are complaining loudly that the local dialect is
disappearing rapidly, they blame it in too many Londoners
or South Easterners moving into the area, or maybe the TV
is killing their dialect.
Personally, having lived there for many years, it is just to hard
for others to understand, one example that I can think of was
Old Henry, Henry was a born and bred Cornishman who worked
in my fathers petrol/gas station, his son-in-law was also born
and bred Cornishman, yet when they were speaking to each other,
Henry would look at me and say, "what did errr say Mayike"?
He had trouble understanding his daughter's husband, so the
Cornish who run businesses like hotels, pubs or restaurants, in fact
anything to do with Tourism, the main industry there, have had to
tone down their way of speaking or go bust!
I can speak and understand the local dialect of Cornwall.
Mike.