Scotland is not exactly the same situation as Ireland. Dont forget that Gaelic was not native language to all of Scotland. Northumberland once stretched as far as Edinburgh and the lowland "Scots" accent as far as there is accually a modified Northumberland accent.(Some will dispute this of course). If we take the case of the Orkneys .. they once belonged to Norway and was "loaned" to England during the Tudor (I think) period because the King of Norway could not afford the dowry on his daughter with the intention that when he managed to cough up the 5000 quid or so he could have it back. (No doubt some historian out there will give the actual story) ... Anyway historically the native tongue there is Norwegian and never has been Gaelic.