If it is not korean it means that you probably updated you ios 70/80 with the korean key.
The good news is you probably also patched the ios with the trucha bug. So you can simply load custom recovey disc to fix it.
The bad news is you most likely do not have dip patch on the system ios, so you likely need a modchip.
Bad news number two is your wii is new and does not support modchips, so you need to replace the dvd drive or buy a wode.
Possibly bad news number three, you wii is new and you may or may not have game cube ports. No gamecube ports, no savemii/savemiifree. No savemiifrii, no recovery menu, no recovery menu, no modchip boot disc fix.
I don't know what you did, so possibly cross your fingers and see if priiloader is installed. Just hold reset and power on the wii.
The wii is 100% fixable, it may or may not be a pain in the ass.