W10_11langpack.ps1 //free\\ May 2026

function Install-LanguagePack # Add language pack CAB dism /online /Add-Package /PackagePath:"$SourcePath\lp.cab" /Quiet /NoRestart # Set as system UI language (requires reboot) Set-WinSystemLocale -SystemLocale $LanguageCode Set-WinUILanguageOverride -Language $LanguageCode Set-WinUserLanguageList -LanguageList $LanguageCode -Force

The script would be a wrapper around the Deployment Imaging Service and Management (DISM) tool, which is the only supported method for language pack servicing. w10_11langpack.ps1

[Parameter(Mandatory=$false)] [switch]$IncludeSpeechRecognition, function Install-LanguagePack # Add language pack CAB dism