Of course Scotch is an English term but so is Scot and Scottish. My ancestors called themselves Scotch when speaking English,which to them was a foreign tongue. In Gaelic they were Gaels but this term would not apply to everyone from Scotland. Scotch included descendants of natives of Scotland as Irish descendants still consider themselves Irish. The great dispora of these Gaels took place in the early to mid 1800's so the term still lives even if it has fallen out of favour in Scotland itself. As I said "a tempest in a teapot"!