We have some documentation links for using Arabic and other language fonts in the post here: Problem printing arabic text and logos with the iMZ320 ZEBRA ?
I have a few details specific to Arabic here: Re: Arabic text printing using iMZ320
What method are you using to download the font?
Hope this helps
Is there a way to print from right to left on zebra iMZ320 using CPCL?
Is there any example