Calgacus said:
One province, jordarkelf, that could change culture in the 1187 scenario could be Strathclyde. The region depicted looks more like Lennox, which was completely Gaelic-speaking (save the burgh of Dumbarton) into the modern period, but it is called Strathclyde, which changed culture from Celtic to English sometime between 1150 and 1300, and that settlement did begin earlier than anywhere else save the already English provinces. If you really want to change one, it would be that one.
Finally decided to put your files over the default ones. Looked at the 1066 scenario for Scotland. Here are my suggestions:
1) Get rid of "Maldred of Atholl": i) probably a genealogical fiction ... Cospatric was the son of Maldred of Crinan, but the last part is the only evidence to connect him to Crinan father of Donnchad and thus the royal family. Probably just another Crinan of that name. ii) he was dead in 1066; iii) didn't control Galloway. I'll suggest alternative ownerships for Carrick and Galloway below.
2) You have two Gospatrics, one ruling Berwick called "Gospatric of Atholl" and another ruling Cumberland called "Gospatric of Dunbar". They are not different. The real Gospatric, Gospatric Earl of Northumbria should control the provinces of Strathclyde, Lothian, Berwick and Cumberland and have a claim to the earldom (Duchy) of Northumberland. He could use Duke of Lothian to simulate his status. You could put his son Dolfin as a vassal in CUmberland, as DOlfin was the rule when William Rufus expelled him from Carlisle.
3) Carrick and Galloway are Irish Sea Norse-Gaelic regions with nothing to do with the Kingdom of Alba until later. Put in charged of Carrick "Mac Congail".
http://en.wikipedia.org/wiki/Kingdom_of_the_Rhinns
For the sake of genealogical convenience you can follow Benjamin Hudson's argument that Mac Congaill was the son of of Fingal mac Gofraid (son of Sitric). Galloway you could either give to Mac Congaill, or to someone else in the Manx-Dublin family (who definitely ruled it). Godred Crovan for instance or his son Lagman.
4) Godred Crovan's dad is called "Harald ddu"; i assume Harald Dub is meant, yeah?
5) These Norse-Gaels, in Galloway, Man, Hebrides, etc, are Gaelic speakers of Norse paternal lineage who sometimes learned Norse, so is their population. You can't have both the provinces and the rulers Norwegian ... just doesn't represent the dynamics very well.
6) You don't have to use weird malformed spellings drawn from Anglo-Latin documents you know! Martachus is Muirchertach ... but this guy is just a name from a charter of the 1110s. Here's the list of known mormaers of Mar:
http://en.wikipedia.org/wiki/Earl_of_Mar#Early_mormaers_or_earls
I suggest you should use for Martachus this guy:
http://en.wikipedia.org/wiki/Máel_Petair_of_Mearns
You'll see why when you read. Mar btw is situated where Mearns actually is. Put a placeholder in Buchan, call him Cainnech and make him you per
http://en.wikipedia.org/wiki/Earl_of_Buchan#Early_Mormaers.2FEarls_of_Buchan
Make him a vassal of Scotland.
7) Your count of Atholl, Mael Muire, is written as Mael miur.
8) Maldoven of Angus is fictional, as is his genealogy.
9) Suggested reorganization of Scotland in 1066:
i) Mael Coluim should lose Lothian, Fife and Strathclyde.
ii) He should gain Atholl (definitely the capital province, containing in CK Dunkeld, Scone, and most other early royal centers).
iii) He should gain Angus.
iv) He could gain Argyll, prolly for the best
v) Gain a claim on Duke of Lothian (Gospatric), County of Strathclyde and Lothian, but not Berwick (he will gain overlordship with Duchy).
vi) give Cospatric a claim of Duke of Northumberland, counties of Westmorland and Nothumberland.
vii) Remove the duchy of Albany. This just means Scotland in this period, and there is no need for it at this stage.
These things correspond with current historiography, see for instance Alex Woolf,
From Pictland to Alba
Other things you could do to inprove the historical dynamic:
10) Make Durham a bishopric (definitely), subject to York (if existing). Durham was a proper-Prince bishopric. It's ruler was the bishop, not the early ... that's the very definition of County Durham
11) Create the Mac Duib (Macduff) family for Fife.
You could also consider:
12) Make York an archbishopric
13) Make Kent an archbishopric