. ▁Like ▁the ▁other ▁Man de ▁languages , ▁it ▁is ▁a ▁t onal ▁language . ▁It ▁is ▁written ▁in ▁the ▁Latin ▁script ▁and ▁the ▁Arab ic ▁script , ▁as ▁well ▁as ▁in ▁the ▁ind igen ous ▁N ' K o ▁script . ▁ ▁Di ou la ▁can ▁be ▁heard ▁spoken ▁in ▁the ▁ 2 0 0 4 ▁film ▁Night ▁of ▁Tr uth , ▁directed ▁by ▁F anta ▁Rég ina ▁N ac ro , ▁Bur k ina ▁F aso ' s ▁first ▁female ▁director . ▁ ▁Writing ▁systems ▁and ▁ph on ology ▁ ▁Latin ▁alphabet ▁and ▁orth ography ▁ ▁Di ou la ▁orth ography ▁is ▁reg ulated ▁in ▁Bur k ina ▁F aso ▁by ▁the ▁Di ou la ▁Sub - Comm ission ▁of ▁the ▁National ▁Commission ▁for ▁L anguages . ▁On ▁ 1 5 ▁July ▁ 1 9 7 1 , ▁the ▁National ▁Sub - Comm ission ▁for ▁Di ou la ▁was ▁created ▁and ▁on ▁ 1 6 ▁July ▁ 1 9 7 1 , ▁it ▁began ▁a ▁study ▁in ▁order ▁to ▁set ▁the ▁Di ou la ▁alphabet . ▁An ▁alphabet ▁was ▁published ▁on ▁ 2 7 ▁July ▁ 1 9 7 3 ▁and ▁gained ▁official ▁status ▁on ▁ 2 ▁February ▁ 1 9 7 9 . ▁Some ▁letters ▁were ▁added ▁later , ▁ ‹ ▁c , ▁j ▁ › ▁for ▁borrow ed ▁words , ▁and ▁others ▁were ▁replaced : ▁ ‹ ▁sh ▁ › ▁by ▁ ‹ ▁s ▁ › , ▁and ▁ ‹ ▁ny ▁ › ▁by ▁ ‹ ▁ ɲ ▁