Hi, just loosing my forum-virginity with this message
The difference between a PC owned in the US and one owned in Europe is that small (most often) red switch at the back of the computer where it says at one end 110V and on the other 220V. If you live in the US you better make sure it is set to 110V so you won't fry your computer. Then when you bring your computer to Europe you flip that switch to 220V. The internal voltages and frequencies are always the same!
The only difference between US and EU releases are:
Box art, manual revisions and game versions.
I.e. the game gets released first in Europe so it is version 1.0
US gets it 2 months later so they get version 1.1
Only difference is that Europeans have to download a patch.
I've bought PC games on both sides of the Atlantic: US, Canada, Germany and Sweden.
There has only been 2 games released in Europe that didn't work on computers which didn't have an english language version of Windows and Keyboard (i.e. UK or US releases). Those two games were Heavy Gear 2 and Interstate '82. Most keys on the keyboard didn't work on my swedish Windows '95 and keyboard, until that is, Direct X 8.0 was released which standardised the language system and put it all together in a nice good ol' package
So don't worry, just bid on that WCP

and enjoy!!!
Now if you said you were buying a chinese version, then I don't know how it all would work out, but even if everything worked ok, the language barrier might be a thing that could ruin the story

The keyboard layout might also pose a problem
BTW: In England (and Australia) they speak British English. In the USA people speak American English. If you're thinking of what the differences are except for the accents/dialects well here are som examples:
color-colour meter-metre, small differences as you can see
Sincerely
Mike