I mean chinese and japanese do share some roots, but they're different enough languages that it's not a hundred percent.
It's funny how Lie Ren is often considered the most level headed of the cast, and yet in this first onscreen fight this crazy stunt is pulled. I mean even Nora uses her hammer, but Ren decides "Heck with it, I'm going to kill this snake with its own massive fang, because that's an entirely reasonable decision." I get the feeling that if it weren't for that one childhood incident, this character would be a lot wilder.
Reminds me of one campaign where one player wanted to play a tiefling luchador (who, thanks to cross-class shenanigans, grappled exclusively with his mustache) and we decided that Abyssal would be Spanish. This then prompted a half-hour-long discussion of which real-world languages were associated with which Pathfinder ones, with the luchador's player keeping notes on the decisions so we wouldn't forget. We managed to perform some accidental worldbuilding based on which races shared which linguistic roots.
I honestly suspect the big thing keeping Ren from being even wilder is Nora. Someone has to be the straight man in their comedy act. And someone has to be the reasonable one at times to make sure they don’t both get in over their heads.
But mostly it’s the comedy act.