Canadian Sharon Campbell-Rayment was knocked unconscious in a riding accident in Ontario in 2008. She lost some speech, but when her voice did come back, she spoke with a Scottish accent, which links to her Scottish heritage.
As The Scotsman reports: "Words such as 'wee', 'grand', 'awright' and 'brilliant' peppered Sharon’s vocabulary as she spoke with a Scots accent"
Five years on she still has the accent. "I could have ended up with any accent - French, Spanish, even Klingon - but I got Scottish. It was definitely a sign."