winget unable to set preferred language for inno installer

[fangq]

Relevant area(s)

WinGet CLI

Relevant command(s)

No response

Brief description of your issue

my package mcxstudio is an inno installer. it has a language selection dialog letting users to choose GUI language during installation.

https://github.com/fangq/mcx/blob/v2025.10/inno/MCXStudio.iss#L162-L180

however, when installing the package via winget, I could not choose the language using AI suggested flags below

winget install mcxstudio --override "/SILENT /LANG=es"

is this possible?

Steps to reproduce

winget install mcxstudio --override "/SILENT /LANG=es"

Expected behavior

Expect the installed GUI to display Spanish language regardless of current system locale

Actual behavior

Default install in the current system locale, regardless of the /LANG flag

Environment

[winget --info]
Windows Package Manager v1.11.510
Copyright (c) Microsoft Corporation. All rights reserved.

Windows: Windows.Desktop v10.0.19045.4529
System Architecture: X64
Package: Microsoft.DesktopAppInstaller v1.26.510.0

[fangq]

never mind, replacing /LANG=es to /LANG=spanish fixed the problem.

closing