Historical European Martial Arts (HEMA) has matured rapidly in the last decade. Once, the only options for learning historical methods of swordplay were modern sport fencing, or the role-play imagined by the Society for Creative Anacronism. HEMA uses the documented courseware (mostly German, some others) of fight manuals from 1300-1900s, and uses modern protective gear to sort out the actual application of techniques. No Scottish sword sources from any earlier than the late 1700s exist, but knowing that continental mercenary service was common, where highlanders could have been exposed to German or Italian longsword styles, some are trying to use practical method to puzzle out how best to use uniquely Scottish swords.
Here is an example of a “tua-handit” sword often mistakenly called a Claymore vs a Longsword:
Here, the Basket-hilt broadsword Claymore and dirk: