that little fact is true. but works against your logic for the very reason that "multicultural" armies usually lacked the cohesion and morale of armies made of one group of people. particularly notable is the in fighting between factions that sometimes outright lead to defeat on a greater scope, or the fact that these factions are not 100% together means espionage was used to start in fighting as a tactic from their opponent to win without fighting.
with that said. even if an army is made of many different groups of people. they stay amongst themselves. in their own formations and camps of purely one culture. that's how it always worked for reasons such as language, or food. they dont just fight together, they live together and travel together...
another thing is. armies wear UNIFORM so they can LOOK THE SAME. but TW puts in 4 different templates to add DIVERSITY....trying to "look different and unique compared to your peers" was usually punished in the army, anybody with experience would know that.
Elon Musk joked about netflix saying they are waiting for the war to end so they can make a movie about a black ukrainian falling in love with a transgender russian soldier. well, this game certainly has that level of wokeness, albeit setting in a time period of the 1200s.
I love how warrior lords, after their initial defeat in battle. start sitting home sometimes. while letting their wives or daughters lead their clan army to battle....such equality go feminism!
we can have a game about conquering the continent, executing prisoners and generally murdering your way around the globe, but "not enough females" omfg that can't possibly stand. go look at armies today, tell me the % of female soldiers, and most importantly % of female commanders... lol