It is pretty tricky, but I think I have a working concept. Everything flips, except for the separators which refuse to flip (I can align them to the right, but it will lose the separator line in the process).
It is quite a bit of work to put this everywhere in the PMS GUI, but at least it appears to be possible.
See the screenshots below of my Arabic concept version. I have no idea what it says (thanks, Google Translate
!), but it appears to be the genuine article.