Martin Scorsese has revealed that Robert De Niro wanted the whole of Killers of the Flower Moon to be filmed in the Osage language.Scorsese revealed the news during a Q&A session with fellow filmmaking legend Steven Spielberg after a screening of the film last week (November 14) at the DGA Theatre in Los Angeles.The recently released film – which is led by Leonardo DiCaprio, De Niro and Lily Gladstone – is based on a non-fiction book of the same name published in 2017. It tells the true story of a series of murders of Osage Native Americans over the rights for the oil under their land in Oklahoma.The film includes several scenes in which the Osage language is spoken, and De Niro in particular enjoyed learning it so much that he asked the director whether the whole film could be made in that dialect.Scorsese said: “By the way, a lot of the Osage language is lost, but they’re putting it back together, so to speak.