Here is a good website on the subject:
http://www.universalteacher.org.uk/lang/britishisles.htm
Here is a rough dialect map of Britain:
http://www.peak.org/~jeremy/dictionary/figures/dialectsUK.gif
Sirona....Yes, it sure is interesting to hear such "archaic" features like that survive in dialects. There is also a tremendous
amount of variation. To take one example, in Standard English (which derives largely from the Suffolk dialect), this is how
you conjugate the verb "to be": I am, you are, he/she is, we are, you are, they are. But across Britain, it varies in different
dialects:
(1) Standard English: 1S am, 2S are, 3S is, 1P are 2P are, 3P are
(2) Yorkshire: 1S is, 2S is, 3S is, 1P are 2P are, 3P are(3) Kent: 1S are, 2S are, 3S is, 1P are 2P are, 3P are
(4) Somerset: 1S be, 2S be, 3S is, 1P be 2P be, 3P be
(5) Northumberland: 1S is, 2S are, 3S is, 1P are 2P are, 3P are
(6) Sussex: 1S be, 2S be, 3S be, 1P be 2P be, 3P be
(7) Suffolk: 1S am, 2S are, 3S is, 1P are 2P are, 3P are
(8) Derbyshire: 1S am, 2S art, 3S is, 1P are 2P are, 3P are
(9) Dorset: 1S be, 2S art, 3S is, 1P be 2P be, 3P be
(10) Hampshire: 1S be, 2S bee(st), 3S is, 1P be 2P be, 3P be
(11) Berkshire: 1S be, 2S beest, 3S be, 1P be 2P be, 3P be
Of course, people from these areas can often speak Standard English as well. But the variation above shows just how
arbitrary the Standard English conjugation is, and if the standard was derived from one of these different dialects,
Standard English would be quite different.