Traits question

[lysarin]

You could just add them as antitraits to each other. Also add a NoGoingBackLevel so the trait won't be lost if another one is gained.
And make sure you have the right exclude cultures (you have roman as an excluded culture but the trigger only allows romans, but they can't gain it unless you remove the roman culture from the trait).

Like this:

;================================================== ======
Trait Trait_One
    Characters family
    ExcludeCultures barbarian, eastern, hun, nomad, carthaginian
    NoGoingBackLevel  1
    AntiTraits Trait_Two, Trait_Three, Trait_Four, Trait_Five, Trait_Six, Trait_Seven

    Level Trait1
        Description Trait1_desc
        EffectsDescription Trait1_effects_desc
        Threshold  1

        Effect X  b

;================================================== ======
Trait Trait_Two
    Characters family
    ExcludeCultures barbarian, eastern, hun, nomad, carthaginian
    NoGoingBackLevel  1
    AntiTraits Trait_One, Trait_Three, Trait_Four, Trait_Five, Trait_Six, Trait_Seven

    Level Trait2
        Description Trait2_desc
        EffectsDescription Trait2_effects_desc
        Threshold  1

        Effect X  c

And so forth...

And the triggers (one is enough):

;------------------------------------------
Trigger trigger_one
    WhenToTest CharacterComesOfAge

    Condition FactionType empire_west

    Affects Trait_One  1  Chance  xx 
    Affects Trait_Two  1  Chance  xx 
    Affects Trait_Three  1  Chance  xx 
    Affects Trait_Four  1  Chance  xx 
    Affects Trait_Five  1  Chance  xx 
    Affects Trait_Six  1  Chance  xx 
    Affects Trait_Seven  1  Chance  xx

Make sure you don't misspell anything... think that's it. I'm in a hurry so I might have made a mistake... but it looks right.