To add Arabic support in SharePoint 2010, download and install the following
- Arabic language pack for Windows Server 2008 R2 SP1 (http://www.microsoft.com/downloads/details.aspx?familyid=2100fa2b-eba5-4827-86b1-1b19e6e9694e&displaylang=ar)
- Arabic language pack SharePoint 2010 (http://www.microsoft.com/downloads/details.aspx?displaylang=ar&FamilyID=046f16a9-4bce-4149-8679-223755560d54)
