It uses the command Add-WindowsCapability or Add-AppxPackage to install the language features.
It points to a local or network path containing the .cab or .appx language files. w1011langpackps1
For a home user, the GUI is fine. But for professionals, offers several critical advantages: including keyboard layouts and regional formats.
It ensures that every machine has the exact same localized settings, including keyboard layouts and regional formats. w1011langpackps1