$regionalsettings = 
            "<gs:GlobalizationServices xmlns:gs='urn:longhornGlobalizationUnattend'> 
            <!--User List-->
            <gs:UserList>
                <gs:User UserID='Current' CopySettingsToDefaultUserAcct='true' CopySettingsToSystemAcct='true'/> 
            </gs:UserList>
            <!-- user locale -->
            <gs:UserLocale> 
                <gs:Locale Name='de-AT' SetAsCurrent='true' ResetAllSettings='true'/> 
            </gs:UserLocale>
            <!-- system locale -->
            <gs:SystemLocale Name='de-AT'/>
            <!-- GeoID -->
            <gs:LocationPreferences> 
                <gs:GeoID Value='14'/> 
            </gs:LocationPreferences>
            <gs:MUILanguagePreferences>
                <gs:MUILanguage Value='de-AT'/>
            </gs:MUILanguagePreferences>
            <!-- input preferences -->
            <gs:InputPreferences>
                <!--en-AU-->
                <gs:InputLanguageID Action='add' ID='0c07:00000407' Default='true'/> 
            </gs:InputPreferences>
            </gs:GlobalizationServices>"
    
        $regionalsettings | Out-File C:\Windows\Temp\Region_de-AT.xml

        $regionalsettingsXML = "C:\Windows\Temp\Region_de-AT.xml"
        & $env:SystemRoot\System32\control.exe "intl.cpl,,/f:`"$regionalsettingsXML`""
        Start-Sleep -Seconds 5
        Restart-Computer -Force