Originally Posted by preta
No, they have not. I don't really feel like it's all that likely, either. Acquiring the fan translations for Ys Chronicles, Felghana and Origin, which are a lot smaller and easier to re-edit (and all done by the same team to begin with), is one thing, but I feel like if they were to do Zero/Ao, they'd probably want to use the same translator and editor they've been using to assure the utmost consistency.
Floofy (RIP) made a good post about this on XSEEDs own forums where she pointed out that even if they got the fan TL, they'd need to do so much editing and consulting of the original JP script, they basically wouldn't even save time vs just translating the game themselves from scratch.