Disallow selection of Custom Locales
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows Vista
Path in the GPO console
Computer Configuration\Administrative Templates\System\Locale Services Description
This policy setting prevents a user from selecting a supplemental custom locale as their user locale. The user is restricted to the set of locales that are installed with the operating system. This does not affect the selection of replacement locales. To prevent the selection of replacement locales, adjust the permissions of the %windir%\Globalization directory to prevent the installation of locales by unauthorized users. The policy setting "Restrict user locales" can also be enabled to disallow selection of a custom locale, even if this policy setting is not configured. If you enable this policy setting, the user cannot select a custom locale as their user locale, but they can still select a replacement locale if one is installed. If you disable or do not configure this policy setting, the user can select a custom locale as their user locale. If this policy setting is enabled at the machine level, it cannot be disabled by a per-user policy setting. If this policy setting is disabled at the machine level, the per-user policy setting will be ignored. If this policy setting is not configured at the machine level, restrictions will be based on per-user policy settings. To set this policy setting on a per-user basis, make sure that you do not configure the per-machine policy setting.
Registry
Software\Policies\Microsoft\Control Panel\International Value name: CustomLocalesNoSelect
Enabled: CustomLocalesNoSelect = 1
Disabled: CustomLocalesNoSelect = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/ADMX_Globalization/CustomLocalesNoSelect_2 Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Disallow selection of Custom Locales
; State: Enabled
; Supported on: At least Windows Vista
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International]
"CustomLocalesNoSelect"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Disallow selection of Custom Locales
# State: Enabled
# Supported on: At least Windows Vista
$path = 'HKLM:\Software\Policies\Microsoft\Control Panel\International'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'CustomLocalesNoSelect' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/ADMX_Globalization/CustomLocalesNoSelect_2
Data type: String
Value:
<enabled/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Disallow selection of Custom Locales
# State: Enabled
# Supported on: At least Windows Vista
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Control Panel\International' -Name 'CustomLocalesNoSelect' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Disallow selection of Custom Locales
# State: Enabled
# Supported on: At least Windows Vista
$path = 'HKLM:\Software\Policies\Microsoft\Control Panel\International'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'CustomLocalesNoSelect' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Disallow selection of Custom Locales
# State: Enabled
# Supported on: At least Windows Vista
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Disallow selection of Custom Locales
# State: Enabled
# Supported on: At least Windows Vista
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Control Panel\International' -Name 'CustomLocalesNoSelect' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Disallow selection of Custom Locales
# State: Enabled
# Supported on: At least Windows Vista
$path = 'HKLM:\Software\Policies\Microsoft\Control Panel\International'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'CustomLocalesNoSelect' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.