The director recalled how he "inherited" the actor, who was first cast in "Captain America: Civil War" by the Russo Brothers, and was in two minds about directing the "Black Panther" stand-alone. "His first (scene) with Scarlett Johansson as Black Widow, then, with the South African cinema titan, John Kani as T'Challa's father, King T'Chaka. It was at that moment I knew I wanted to make this movie. After Scarlett's character leaves them, Chad and John began conversing in a language I had never heard before. "It sounded familiar, full of the same clicks and smacks that young black children would make in the (United) States. The same clicks that we would often be chided for being disrespectful or improper. But, it had a musicality to it that felt ancient, powerful, and African." After he watched "Civil War", Coogler asked Nate Moore, one of the producers on the film, about the language. "Did you guys make it up?" he asked, to which Moore replied, "that's Xhosa, John Kani's native language. He and Chad decided to do the scene like that on set, and we rolled with it." Collaborating with Kani, Boseman learnt Xhosa to make the African language the character's native tongue, and memorised his lines on the spot.