Setting Regional format with PowerShell

I'm trying to set some Regional Settings for all devices in my company. So far I didn't have any problems with Keyboard Layouts etc. but I can't find a way to control the highlighted settings with PowerShell..Does anyone know how to control these settingsenter image description here with PowerShell?

I've already tried the Set-WinSystemLocal CMDlet but I cannot find a way to check the highlighted settings.