An aggressive, new-device (Autopilot / first-boot) AU standardisation script.

force-geo-en-au.ps1

#Requires -RunAsAdministrator
$ErrorActionPreference = "Stop"

Write-Output "Starting aggressive Australian language and regional configuration..."

# --- SYSTEM LEVEL ---

Write-Output "Setting system locale to English (Australia)..."
Set-WinSystemLocale -SystemLocale en-AU
Write-Output "System locale set to en-AU (reboot required)."

Write-Output "Setting system timezone to Australian Eastern Standard Time..."
tzutil /s "AUS Eastern Standard Time"
Write-Output "Timezone set to AEST/AEDT."

# --- USER EXPERIENCE ---

Write-Output "Configuring preferred language list to English (Australia) only..."
$langList = New-WinUserLanguageList en-AU

# Ensure AU language + standard AU keyboard
$langList[0].InputMethodTips.Clear()
$langList[0].InputMethodTips.Add("0c09:00000409")

Set-WinUserLanguageList $langList -Force
Write-Output "User language list enforced to en-AU."

Write-Output "Setting Windows UI language override to English (Australia)..."
Set-WinUILanguageOverride -Language en-AU
Write-Output "Windows UI language override applied."

Write-Output "Setting user culture to English (Australia)..."
Set-Culture -CultureInfo en-AU
Write-Output "User culture set to en-AU."

Write-Output "Setting home location to Australia..."
Set-WinHomeLocation -GeoId 12
Write-Output "Home location set to Australia."

# --- BEHAVIOUR CONTROL ---

Write-Output "Preventing Windows from automatically changing culture based on language list..."
Set-WinCultureFromLanguageListOptout -OptOut $true
Write-Output "Culture-language coupling disabled."

Write-Output "Aggressive Australian configuration complete."
Write-Output "A reboot is required to finalise all settings."