For my own reasons I just Googled غولدنشترن to find out who besides Mamduh `Adwan uses this spelling for Hamlet's friend. I came across a 2010 PDF script for a offshoot play called Hamlet's Trial, which "takes up where the splendid William Shakespeare left off." By one Ala'a al-Gharbawi. It's also at this blog. It includes a very brief Author's Note "for those who have never read Shakespeare's play before." Anyone have details? No time to read it now, but maybe you'd like to.