Sets the system locale (the language for non-Unicode programs) for the current computer.
Set-WinSystemLocale [-SystemLocale] [<CommonParameters>]
The System-locale setting determines which code pages (ANSI, DOS, and Macintosh) the system uses by default. If you change the System-locale setting, the necessary bitmap font files are installed to support legacy applications in the selected language. Note that because this is a system setting, this can only be changed by a user with Administrator permissions, and changes do not take effect until the computer is restarted.
Accept pipeline input?
Accept wildcard characters?
This command sets the system locale to Japanese (Japan).
PS C:\>Set-WinSystemLocale ja-JP