AHC: Largest extent of Scottish English

What's the largest land area that Scottish English could spread to?

Note: In 2012, ITTL's Scottish English must resemble OTL 2012's Scottish English.
 

Thande

Donor
That's rather difficult. I suppose you could say Scots is retained in colonies that had a lot of Scottish or Ulster immigration in OTL (Nova Scotia, Georgia etc) but the butterflies mean your final criterion probably wouldn't apply.
 
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