Set the locale to ar_EG

lang/ar/moodle.php

@@ -482,7 +482,7 @@
 $string['hitsoncoursetoday'] = "Today's hits on \$a->coursename by \$a->username";
 $string['jumpto'] = "Jump to...";
 $string['language'] = "Language";
-$string['locale'] = "ar_AR";
+$string['locale'] = "ar_EG";
 $string['passwordrecovery'] = "Yes, help me log in";
 $string['show'] = "Show";
 $string['showrecent'] = "Show recent activity";