Changing PowerShell UICulture

PowerShellUICulture.ps1

PS C:\Users\Admin> [Threading.Thread]::CurrentThread.CurrentUICulture

LCID             Name             DisplayName
----             ----             -----------
1041             ja-JP            日本語 (日本)

# example: Set-PowerShellUICulture -Name "en-US"

function Set-PowerShellUICulture {
    param([Parameter(Mandatory=$true)]
          [string]$Name)

    process {
        $culture = [System.Globalization.CultureInfo]::CreateSpecificCulture($Name)
       
        $assembly = [System.Reflection.Assembly]::Load("System.Management.Automation")
        $type = $assembly.GetType("Microsoft.PowerShell.NativeCultureResolver")
        $field = $type.GetField("m_uiCulture", [Reflection.BindingFlags]::NonPublic -bor [Reflection.BindingFlags]::Static)
        $field.SetValue($null, $culture)
    }
}

PS C:\Users\Admin> [Threading.Thread]::CurrentThread.CurrentUICulture

LCID             Name             DisplayName
----             ----             -----------
1033             en-US            English (United States)

# example: Set-PowerShellUICulture -Name "ja-JP"