This form for the past participle of the verb to prove is said to be a Scotticism.
The thing they most dreaded was to be convicted of a Scotticism.
In his own copy Bruce had written, "Starts thy curious voice to hear;" curious is a Scotticism, being equivalent to strange.
I am sensible I myself have since that time acquired Scotch in perfection, and many a Scotticism withal.
The following had an indescribable piquancy, which arose from the Scotticism of the terms and the manners.