Hi Amit
I suggest you check the Arabic guide available on UAE country page
service.sap.com/globalization
and then browse from the left pan to country information --> middle east and africa --> united Arab Emirates
on this page, on the right side of the page there is a link to Guide to SAP in Arabic
there are many steps that explain how to install SAP in Arabic
please let me know if it works with you or you need further support
regards
Khaled