I don't know if this is a practical option for you or not, but some years ago while working for an online casino, we had an actual German-speaking copywriter and she'd translate what the Eanglash writer wrote.
Reason being that online translators apparently sounded very funny in their target languages. (For some perspective, think about how funny "Engrish" sounds to us.)
With that strategy, as far as a Wordpress site goes, it would just be a matter of making an Author or Editor account for each of the writers, filtering them out and serving them up onto your template in some way. Maybe using categories or subpages.
Again, I don't know if that'd be a practical solution for you, but it might be a better solution if it's possible.