The MK Raiden/Rayden is pronounced as "Rayden" by the various voice-overs, kind-of forcing things. (But Japanese people will say it as proper Japanese nonetheless; that comes up once in Hi Score Girl.)
I wouldn't go to mortal kombat for authentic, well anything, Shaolin monks are Chinese pacifists, Raiden is a shinto god, everything is wacky, play mk for punching off peoples skulls, not learning about Asian cultures and language