Well since the western hemisphere is the US and we speak english then c-west would be english. And since turky in the the EASTern hemisphere, c-east would be a turk server.
I recall that at the beginning of both servers k2 said : C-west is for english/spanish/polish whatver only some country's IP's can get in. They also said that people that had IP's for C-west wouldn't be able to log into C-East and visa versa.
So yes, C-East is a turk server only