The Auld Alliance was a international political treaty organization set by the former monarchs of Scotland and France. Neat thing is that both nations used the fluer-di-lis as royal emblems. For Royal France the lilies are yellow and the centerpiece, while for Scotland the lilies are red and spread around the double frame, tressure.
Primarily this is a post-historical, educational flag that represents the ancient connections that nations can have. The kingdoms of Scotland and France would team up to keep English ambitions in check. Additionally persons or companies of a joint Scottish-French are privy to use the flag at their leisure.
But do note, there is no longer a singular Scottish King—not since 1603. Likewise there is no longer a French Monarch—not since 1870.
In the binary tradition of Scottish tanistry, this flag also represents Auld Lang Syne. A flag and song not only for Scotland, it is dedicated to France, the West, England, the UK, and the world. This song is enchanted with nostalgia and the past, that once upon a time souls lived before us, which fought, died, and prayed, and are undeniably interconnected with our lives from Africa, Asia, the Americas, unto Australia, and worlds beyond. These ancient souls once lived on our humble abode, and at the passing of every Old Year an echo of their lives with this hymn is played, beckoning us to cherish the past...