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

### Describe the bug

My application is - WinUI3 XAML based C++WinRT, **Unpackaged** App
for handling MultiLanguages strings, I am implementing .resw files.
[Microsoft.Windows.CppWinRT version 2.0.240405.15]

There are two resw files

Englishtext
Strings/en-US/Resources.resw

Polish text
Strings\pl-PL\Resources.resw

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.

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

Thanks,
MChauhan

### Steps to reproduce the bug

-

### Expected behavior

_No response_

### Screenshots

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### NuGet package version

None

### Windows version

_No response_

### Additional context

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Start by reviewing the resource paths Strings/en-US/Resources.resw and Strings/pl-PL/Resources.resw, then trace the use of Windows.Globalization.ApplicationLanguages::PrimaryLanguageOverride in an unpackaged C++/WinRT app. Reproduce the preferred-language behavior and package-identity exception; done means establishing a supported way to select Polish or documenting the limitation clearly.

Written by the indexing model from the issue text.