I remember a day on GBAtemp where the wii forum was indeed filled with "INSTALLED OLDER SYSTEM WAD, CONSOLE BROKEN??" posts. It was only a couple of months ago too.
Given the year was 2002, I don't think English hegemony on the internet was in full effect yet. Obviously now everyone in Europe knows English perfectly but back then I don't think it was as common.
I would genuinely be interested if the Wii can play Demon Front well or not, though I don't really expect much. The game it probably would be able to play full speed is Dodonpachi Dai Ou Jou since I believe it doesn't utilize an ARM chip, along with some other, earlier PGM games that mostly used...
Wiistation is indeed a fork WiiSXRX which was a fork of WiiSXR, they're both obsolete now and not worth using. WiiSX got completely rewritten so it's either that or Wiistation, they both give pretty good results.