Mr Leyland fought against local fighter, Shagon Yellow and lost, but admitted his opponent was surprised when he uttered a phrase in ‘Hausa’ shortly before the match.
He said: “I remembered the Rocky film when Ivan Drago was stood in front of Rocky where he says ‘if he dies he dies’.
“I thought if I can take a little bit of that with me, so I said in their language, ‘Leyland is here and he will win’ and he was really taken aback but equally I could tell the community had respected my willingness to learn.
“Whatever the local fighters go through, I wanted to go through, out of respect for the sport and the people.”
The documentary has not been released yet, but Mr Leyland said he wats to showcase his journey to the world.