there is problem between showing the arabic language and meaningless symbols. examples:-
1-the first problem:- from the main page in english language u cant view to the topic which is in arabic language directly , c the image:-

and if u press on the topic (which is not arabic language) sure the symbols going to show up c:-

2- the second problem:- if i want to share the topic link, it wont work it will give the same result as this image http://i.imgur.com/jBkrfaF.png
for example:- https://www.whonix.org/forum/index.php/topic,1344.0.html
the only way to view the topics is:- pressing arabic on the top of the main page and then view the arabic topics or giving the link of the general arabic language which is this one:- https://www.whonix.org/forum/index.php/board,19.0.html
but giving the exact topic link or viewing the link from outside it wont be readable.
hope u fix that as u soon as u can. thnx