Culture traditions for Strong Trait

[Kowalsky]

There are 3 traditions that increase chance for getting a strong trait: Coastal Warrios, Warrior Culture and Hirds, each giving (by Wiki) 1% Chance to be born with the Strong trait for each 5 Prowess. First off all, you are not born with the Strong trait but have a chance to get it up to adulthood so 16 year old, secondly Wiki says that you can't have one while having another but you certainly can when you mix cultures.
Are those tradition stack up or overwrite each other? If I want to create a culture for super prowess people should I try to get all 3 or I am just wasting slots for traditions?
Also I am not sure if I understand the mechanic for getting the trait; let's say I have a kid with 10 prowess and only Coastal Warrios tradition, does it mean that my kid has 2% chance every year to roll the strong trait? And does the mechaninc take under considaration onbly base stat of the character or if I will get my child some legendary weapon and armour busting his prowess will I boost his chance for Strong trait too?

[jerrypocalypse]

The chances for specific traits from traditions do not stack. Having only one of the traditions is the same as having all of them.

Originally posted by Kowalsky:

First off all, you are not born with the Strong trait but have a chance to get it up to adulthood so 16 year old,

Pretty sure that's just a translation hiccup. It just ups the chance of getting Strong as the child grows up.

Regarding the notes in the wiki about not being able to take certain traditions while having others, those are in regards to reforming culture and adding traditions (they'll be greyed out with a note you can't add the tradition because of another tradition you have). Hybridizing overrides this mechanic because of how you're just marking which combination to keep from both.

[rossobianco]

I was asking myself the same querstion, and found a thread in the paradox forums where they said it doesn't stack.
https://forum.paradoxplaza.com/forum/threads/hirds-and-coastal-warriors-together.1541357/#post-28464737