However, English has only one existing cognate language ~ Freis in Freisland, and it doesn't sound anything like English. Freis itself doesn't have as many dialects as your standard Germanic languages do.
Colonial Dutch, in the British colonies, was derived from a handful of Dutch dialects and within two generations it'd broken up into the requisite 32 different dialects, although many analysts argue it actually created a brand new 33rd dialect spoken West of Albany.
One of the characteristics of English that makes it the dominant language wherever it is spoken is that it doesn't form dialect forms very easily ~ if at all.
Oh that I *really* can't agree with.....American English dialectology is another hobby of mine!! :)
In the Northern Cities shift (Chicago, upstate NY, etc), the entire short vowel system is moving. American dialects are diverging further than they ever have right now.
Mutual intelligibility tests have show that we are having big problems understanding each other!