Both the name and the image for arabic are not correct:
* The name is "Arabic/Emirates"
* And the icon is missing.
I suggest the following:
* Use the name "Arabic", here it is in arabic letters: عربي
* Use the KSA icon as a default icon, i,e makea copy of "sa.gif" and name it "ar.gif", of course if the website owner is from Morocco - like me - he can copy the ma.gif icon but it's always good to have the plugin present a default icon. I suggested the sa.gif icon because it's fairly accepted to use the KSA flag as the arabic language flag.
Thanks for this great plugin