Unfortunately, that's not related to 'power'. Another user translated into Arabic too and the translation also had to be rejected for technical reasons.
Is must be a bug. I notified JP, but we never know when he will log in, specially at this Christmas season.
The requester submitted her text a second time, after you rejected the translation into Arabic.
But she didn't submit it from the same page, she typed her text using another translation request.
No, it was the opposite. I set this request in standby and asked the requester to correct the line. Despite the standby, it still was available and Aneta translated it. After that she submitted the requests into Arabic and Hebrew which I also set in standby and asked her to make the requests from the first page she used, but the Arabic was translated anyway.
That's why I think there must be some bug.