I'm not an avid YuYu Hakusho fan. I mostly rember it due to a Latin American meme regarding the Knife Edge Deathmatch. In the English dutb it isn't THAT BAD since Kuwabara figures out that it's a deathmatch with knives.
For some reason, the Latin American dub makes them sound dumber for not figuring out what a "Duelo a muerte con cuchillos (Duel to the Death with Knives for the Spanish impaired.) Because Knife Edge Deathmatch sounds a bit more mysterious, since the Edge is the confusing part. The confusion everyone has works in Japanese, since the dude making the Knife Edge Deathmatch says Naifuejjidesumatchi in beautiful Engrish. So it's understandable that Japanese teens with rusimentary English knowledge would have issues with localizing the meaning. But when the English and LatAm Spanish dubs came, localization didn't change Knife Edge Deathmatch to a different language: