The thing is that, originally my account registered in Lithuania, and thnx god we don't have translate version of appstore. Because now I moved to Netherlands, I must change country in AppStore to use my credit card. Ok I changed country, so now everything in Dutch and I don't know this language. how to switch everything to english only, and disable any other stupid locale settings on the whole OSX?? I want nothing but english.
As far as I know, the language of the AppStore App is always determined by the country in which your account was registered. The AppStore app is basically just a webview which means that the localization is done by the server and not your mac, in order to change the language to english you'll have to create an english account. You could also change the region of your account in the account settings, but that would make it impossible to use a foreign credit card. There's also a thread on Apple's Support Communities Board about this: https://discussions.apple.com/thread/3797598?start=0&tstart=0