Windows 7 language packs are available for download via optional updates for Windows 7 Ultimate loaded Systems. As they are available via Optional Update so its the only way of getting it. In total there are 34 different language packs can be get by visiting Update Site and not by Microsoft Windows Server Update Services (WSUS) or by Microsoft Download Center.
Interface of Windows 7 will change to the language being selected for installation. Keywords for this update is kbinfo kbexpertisebeginner kbsurveynew KB972813.