When you dual wield their are two "abilities" that say missing information bla bla bla

If you modify the localization file from this mod to:

[DualMeleeDamageModifer X2AbilityTemplate]
LocFriendlyName="Dual Wield Melee"
LocHelpText="Use two melee weapons at a penalty"
LocLongDescription="Wield two seperate melee weapons, allowing for the Secondary Slash ability but reducing damage with both melee weapons to only 75% of normal."
LocPromotionPopupText="Dual Wield Melee"

[DualSlashSecondary X2AbilityTemplate]
LocFriendlyName="Secondary Slash"
LocHelpText="Slash attacks add your secondary weapon"
LocLongDescription="Attack with your offhand melee weapon whenever you use Slash."
LocPromotionPopupText="Secondary Slash"

Than you will have an explanation of what everything does so people can see it properly in game