There is a little problem for some Wii's like for example "german" Wii's.
It affects both loading with official disc-channel, and with soft-loaders.
If you start "Kirby return to Dreamland" on this Wii's you will get a japanese startscreen, and after pressing a button, it will freeze your wii.
It seems to be a language problem, it trys to load the console language, and then freeze.
Forcing a game language with a soft-loader will not fix this problem.
You will get past the japanese startscreen, but then freeze after the title screen.
You must also set the console language to make the game work.Only solution at the moment is:
game loaders language must be set to "default" or "english" (if you use a soft-loader).
console language must be set to "english".
Then it works without issues.
I hope it helps some people