The Scots Gaelic Myth

[Taskr]

The growth and distribution of Scots in Scotland and Ulster: Old English by the beginning of the 9th century in the northern portion of the Anglo-Saxon kingdom of Northumbria, now part of Scotland
Early Scots by the beginning of the 15th century
Modern Scots by the mid 20th century

While splitting hairs, would seem to indicate at least some of the lowlands speaking old English prior to the 12th Century.

I was taught Gaelic in elementary school, and still remember a few simple phrases.