A couple I picked out of
http://old.armageddon.org/ -- scraping the bottom of the barrel.
Whiran robes in Allanak are traditionally cowled (more of a tradition)
In the southlands, [sandals] are worn only by gladiators and/or slaves (more of a tradition)
[In the north], the southern tradition of wielding two weapons is viewed as leaving oneself far too open to a cunning counter-attack, and the relatively simple offensive techniques employed there are looked down upon as being crude and unsophisticated.
And the illnesses have some superstition around them:
In Gol Krathu, [chest decay] is felt to be due to magicks, and a cure advocated by physicians of the region is to place a poultice soaked in whiran blood on the chest of the diseased.
Widely thought to be caused by angry spirits, in Gol Krathu dysentery is called the curse of the Twins, while in several nomadic tribes it is thought to be caused by the restless shades of dishonored ancestors.
In Allanak, it is commonly believed that [the yellow plague] is visited upon those who, through thought or deed, have not been sufficiently grateful to the Highlord Tektolnes for his beneficent protection.
In Vrun Driath, [Maar pox] is known as Tuluki Pox, as it is popularly believed that a Tuluki saboteur brought this contagion to Allanak sometime during the 17th Age.