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You may have 5,000 friends on Facebook, but do any of them only speak Arabic? The social networking site originally intended for Harvard is now branching out into the Middle East by launching an Arabic version. Currently, the English site has 900,000 users in Egypt, 250,000 users in Saudi Arabia, and over 300,000 in Lebanon--but that's nothing compared to the 250 million people worldwide who speak Arabic. "It's potentially huge," said the site's director of localization. Facebook is also adding Hebrew as a language option.