Let me write more on this just to clarify:
1. Currently, the system checks the characters stats (int,str etc) before h/she can wield that certain weapon. For example seduction weapons etc. If the character satisfies that criteria, then he/she can wield that weapon and thereby get the stat boosters associated with that weapon.
2. So to extrapolate, maybe the system can deduct the character's race and then give booster.
3. "Born to wield" maybe the wrong phrase. What I meant was the above...the stat boosters happen based on race deduction.
4. So..for example the "Enkis Short Sword" gives boosters to Enkis Sword skills while the "Ywnnn Short Sword" to the Ywnns.
5. How hard one creates damages with such weapons will depend on their base stats and skill level plus the booster.
6. The weapons can be loots based on whatever 'randomness thats still balancing'

As far as trading/bartering,obviously the Enkis will trade the swords that dont boost their skills (but does for Ywnns) for ones that do the trick for themselves. Hopefully things wont get too complicated than that