Windows 8.1 RTM is leaked, all SKUs are leaked, except CoreCountrySpecific edition. So, is it this SKU leaked ? I think yes, but I will wait for answer.
I think we have to wait as OEM just received this new version to assembly on new Pcs or perhaps i'm wrong
@ms-7 CoreCS SKU is meant for Chinese language only. If you change language forcibly, you'll face several problems (read BTOR's thread).