Some languages are written from right to left .
What I recommend You is as I said on PM, add
*{ direction: rtl !important; text-align: right !important; }
at the end of Oxygen.min.css. But it won't do all the job. Some thins are positioned absolutely. What I recommend you is to download Google Chrome, turn on Inspector ( F12 on keyboard ) and experiment. I would be glad If I could help You, cause it's not so hard to be done ( instead of fact that I'm not an expert and I've got no idea how it should look exactly ), but I've got lack of time currently.
And, btw. I think rtl support should be provided in future releases of punbb.
If any of my dropbox link fails with 404 error, change dl.dropbox.com/u/56038890/punbb/*.zip in address to 82283017.
Currently working on rPlus - responsive theme for developers to create their own themes basing on this one.