Handle Multi Lang Strings in XAML base C++ WinRT Unpackaged application

[mdnchauhan]

Version

Microsoft.Windows.CppWinRT version 2.0.240405.15

Summary

My application is - WinUI3 XAML based C++WinRT, Unpackaged App
for handling MultiLanguages strings, I am implementing .resw files.

There are two resw files

1. Strings/en-US/Resources.resw

Englishtext

2. Strings\pl-PL\Resources.resw

Polish text

XAML

Problem :- I get the text of the Lang which is set as Preferred Lang in settings.
If it is a Polish machine and user has changed the "Preferred Languages" to English instead of Polish. (Settings -> Time&Language -> Lang & Region -> Preferred Languages ), then it picks English string NOT the Polish one.

Is there any way to set the Language as per our need in c++ WinRT app in such a way that my app will pick Polish text only... irrespective of what is set as Default Preferred lang.

Thanks,
MChauhan

Reproducible example

Expected behavior

No response

Actual behavior

No response

Additional comments

No response

[jaigak]

Override the application language by setting the Windows::Globalization::ApplicationLanguages.PrimaryLanguageOverride property.

[sylveon]

Their app is unpackaged WinUI 3. This property doesn't work.

This question should be asked on the WinUI 3 repo.

[mdnchauhan]

Their app is unpackaged WinUI 3. This property doesn't work.

This question should be asked on the WinUI 3 repo.

Yes, our application is Unpackaged.
I tried to set DefaultLang by using winrt::Windows::Globalization::ApplicationLanguages::PrimaryLanguageOverride but it throws exception message "The process has no package identity".

As per your suggestion, I will post this question on WinUI3.