Scots is closely associated with Halloween, neepie lanterns, guisin, dookin fur aipples, treacle scones an aw the rest. The writer below is also worried about what some call the ‘pumpkinisation’ of Scottish Halloween.
From the Open University course Scots language and culture, (Brown, I (2019) 9.Drama, television and film)
You might have heard people in Scotland talk about a person, often a man, being a guiser, or in English ‘geezer’ – an odd looking person. And you will hear people in Scotland talk about going guising at Halloween. The use in connection with Halloween comes much closer to the original meaning of the word, to go masquerading or to be a masquerader, to disguise oneself. The Scots words guise, guising and guiser all originate in Old French guise “manner or fashion” and desguiser “disguise, change one’s appearance”. In today’s French you will come across the verb se déguiser which means to disguise oneself or to masquerade; this too comes from Old French desguiser.