Use the Adobe Creative Cloud desktop app to change the language used in your Creative Cloud apps. Click the Creative Cloud icon, located in the taskbar (Windows) or Apple menu bar (Mac OS), to open the Creative Cloud desktop app.
I'm assuming a windows user here. You might have a fun go at it - trying to edit text in a language you don't support on a non-unicode operating system. What it looks like to me, is you either don't actually have arabic fonts, or the letters of the Arabic sample text are not unicode, and no calling the same glyph names as the arabic counterparts in the unicode arabic font. What do I recommend? Getting an operating system that supports unicode, or getting an operating system that includes native support for the language you're trying to edit. Welcome to vendor lock in and non compliance to industry standards. I hope it doesn't cost you your client, but it's gotta make you wonder - is paying more for an operating system that will lose me work because of not meeting standards really saving me any money?
Campolar: in theory. If you're using Windows it may be a lot trickier than that because of lack of unicode support. I have fought with different scripts. Epson draft font download.
Hebrew, Sanskrit (don't ask, it's a really nerdy answer) and those IPA phonetic alphabet characters. Even on a machine *with* unicode support it can be tricky to get it right. I'd recommend you looking into getting your operating system some arabic suppor, and see if that helps you out. Unfortunately Microsoft not only doesn't comply with industry standards, and fails to implement their own standards with feature parity, but they also go further to take support out so they can make more money by selling limited and localized versions of their operating system with limited language support.
You might not be able to do this without additional software, and it might be easier to simply contract this out to a designer that either has experience with doing arabic design, a Mac user who would have unicode support, or you might have to go back to your client and be honest: 'I neither have the skills nor the software to complete the job I said I could, I'm very sorry (here's the money you may have already paid me) and I apologize for all of your time I have wasted.' If you're comissioning work you'd better expect to pay though. I don't understand how a modern vendor-supported operating system doesn't ship with support for languages you might bump into. Amd gejming evolved. Sounds like you were charged for software that you can't use for development.