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Your system specs show only that you have a Windows 7 x64, not mentioning which edition. If you have Windows 7 Ultimate or Enterprise edition, you can download and install a language pack of your chosen language (for instance Russian).
Language pack allows you to set a master language, which is used on Welcome, login and logoff screens, as well as in new user accounts. You can also set each user account to use a different language, as this login screen of one of my computers shows:
On this PC I have user accounts in Finnish, Swedish, English and German. All accounts completely translated to respective languages.
Language packs are not available for Starter, Home Basic, Home Premium and Proffesional editions. Installing a language pack on these editions can cause your Windows to lose it's genuine, licensed status as told here.
To install language packs: Display Language Packs - Install and Uninstall
To change display language using a language pack: Display Language - Change
Kari