This section will show how to use the regional settings for an unattended install.
Keyboard or input method specifies the input language and the input method for input devices, such as the keyboard layout. The input locale (also called input language) is a per-process setting that describes a language (for example, Greek) and an input method (for example, the keyboard). There can be multiple input locales installed, and the user can switch between input locales. Users can add and remove input locales through the Languages tab of the Regional and Language Options Control Panel.
Currency and Date format specifies the per-user settings used for formatting dates, times, currency, and numbers in a Windows installation. Users can change this value on a running Windows installation, by using the Regional and Language Options program in Control Panel.
Time Zone specifies the computer's time zone. If the time zone is not specified, a default time zone value is used. The default time zone is based on the installed language and region specified in an answer file. If a region has more than one time zone, the time zone is set to the default time zone of that region. The default time zone for that region is specified by the location of the capital/major city. For example, if en-CA is specified, Eastern Standard Time is used as the default time zone because the Canadian capital, Ottawa, uses Eastern Standard Time.
UI Language specifies the language to install that will be used as the default system language to display user interface (UI) items (such as menus, dialog boxes, and help files).