https://bugzilla.redhat.com/show_bug.cgi?id=1008389
--- Comment #2 from Mike FABIAN mfabian@redhat.com --- At the moment I believe this to be a langtable bug because langtable fails to have the proper information about the "ara" keyboard layout.
langtable suggests "ara" as the default keyboard for ar_EG.UTF-8 locale but then does not have any information about "ara", so anaconda cannot tell whether "ara" supports ASCII or not.