The language being spoken by Tom Hardy is Twi. It originates from the West African country of Ghana and a dialect of the Akan people. Twi is still widely spoken and arguably the most spoken native language in Ghana.
Tom Hardy stated he wanted James Delaney to be an amalgam of different classical characters, encompassing traits of Bill Sikes, Heathcliff, Sherlock Holmes, Hannibal Lecter, Oedipus, Marlow from Heart Of Darkness, Rodrigo Mendoza in The Mission (1986) and Don Lope de Aguirre in Aguirre, the Wrath of God (1972). Hardy said: "I wanted James Delaney to be like a classical hero, a man of action, but someone who also has a depth of depravity to him and this great ability to say 'fuck off'."
Tom Hardy revealed that he wanted to film some scenes fully nude but was forced to put on a loin cloth, explaining, "You're lucky there was a loin cloth because I didn't want one. It's not a period drama until someone gets naked and covers themselves in blood. You can't have naughtiness like Game of Thrones on the BBC." Even so, Hardy did film some scenes with full frontal nudity and some of these filming pictures were leaked in the media but all such scenes were cut from the final edit of the show.