Naguib Mahfouz wrote the Cairo Trilogy using, for 10 points, what language of the short story collection One Thousand and One Nights?
A writer in this language used the legend of the Seven Sleepers in his play The People of the Cave. Another author in this language described a friend of the cafe owner Tarzan who seeks revenge on his wife and friend in The Thief and the Dogs. That author used this language to write the books Sugar Street and (*) Palace Walk, which are in a trilogy titled after a capital. A roc's nest is visited by Sinbad the Sailor in a work in this language narrated by Scheherazade. Naguib Mahfouz wrote the Cairo Trilogy using, for 10 points, what language of the short story collection One Thousand and One Nights?
A writer in this language used the legend of the Seven Sleepers in his play The People of the Cave.
Arabic (accept word forms; prompt on "Egyptian" Arabic)