Seeing as it is something of a tradition (and we don't want to bunk tradition do we?) I shall take the opportunity to bring to your enlightened attentions a discussion on the very slight alteration to the 'Scottish' culture, that would bring a vast ray of sunshine and a glow of historicity that we all love to the CK game.
But theriouthly folkths. My suggestion is one of two points:
1) To give the Scottish tag its proper Gaelic names. In this manner the Scots can be represented accurately for the 1066 scenario. Most 'Scots' lands spoke Gaelic and it was the language of the nobles including Malcolm III Canmore. For the later scenarios the nobles could be given either Norman or English depending to account for their influences on the Scottish nobility.
or
2) Rename 'Irish' to 'Gaelic'. and provide 'Gaelic' to the Scottish provinces and in this manner the 'Scots' dominant nobles (as well as the provinces) can retain (or regain to be more accurate) their Gaelic heritage. The current 'Scots' list could then be kept for the later scenarios for the Scottish nobility.
While the current Scottish list is undoubtably vastly improved than the one before the change it can be improved. My wish is for the first option which was argued for (more succinctly than I could ever do) by Calgacus (will find thread) a while back.
http://www.europa-universalis.com/forum/showthread.php?t=201745&page=1&pp=25
I of course have a third option (which I do not think will be popular

)
3) Take an unused Culture (say Celtic or another) and use that for 'Gaelic' (rather than lumping Irish and Scots Gaelic together). In truther I am annoyed we didn't think of this earlier. Here you can use 'Gaelic' in the Scottish held Highland provinces as well as the nobles. While at the same time using the current Scottish culture for the 'anglicised' Scots in later scenarios.
Ayeshteni