Oh, I see, yeah that shouldn't be happening. It's probably a UI problem or job system problem rather than a localization problem.

Looking through the Job Guide it looks like the only other two quest-locked traits that upgrade the effects of actions without upgrading them to new actions outright are at SCH54 and SMN50. If SCH and SMN are experiencing this too, it's a UI problem or a job system problem. If the potency increases are taking effect without questing for the Trait, then it's a job system problem. If the potencies are still correctly lower but the Action Help is getting updated prematurely, a UI problem.