Scotticism n. An idiom, or mode of expression, peculiar to Scotland or Scotchmen. "That, in short, in which the Scotticism of Scotsmen most intimately consists, is the habit of emphasis."
... for the past participle of the verb to prove is said to be a Scotticism. It is not used by careful writers and speakers. ... — The Verbalist • Thomas Embly Osmun, (AKA Alfred Ayres)