Unpackage apps ToggleSwitch's On/Off Content can't change by PrimaryLanguageOverride

[ChenYiLins]

Describe the bug

As the title says. In unpackage apps, I try to set PrimaryLanguageOverride. Then the language in the application has changed, but the On/Off Content of ToggleSwitch is still the system language, not the corresponding language of PrimaryLanguageOverride. This will not happen in Package apps.

Steps to reproduce the bug

1. Set your system language to non-English. Such as Chinese, French, Japanese, etc.
2. In App.xaml.cs, Microsoft.Windows.Globalization.ApplicationLanguages.PrimaryLanguageOverride = "en-us"
3. Run application as Unpackage

Expected behavior

You will see, ToggleSwitch's On/Off Content text will be your system language.If you run application as Package, the text will be displayed correctly in English.

Screenshots

Unpackage:

Package:

NuGet package version

WinUI 3 - Windows App SDK 1.6.6: 1.6.250228001

Windows version

Windows 11 (23H2): Build 22631

Additional context

No response

[ghost1372]

@ChenYiLins
you need to refresh your Frame.
after changing your language, clear backstack and reload your page.

Frame.BackStack.Clear();

// Reload the page that you want to have the new language
Frame.Navigate(typeof(MainPage));

[ChenYiLins]

@ChenYiLins you need to refresh your Frame. after changing your language, clear backstack and reload your page.

Frame.BackStack.Clear();

// Reload the page that you want to have the new language
Frame.Navigate(typeof(MainPage));

In fact, I tried what you said, and it didn't work, the ToggleSwitch's On/Off Text is still not in English.

Unpackage:

PixPin_2025-03-14_13-59-27.mp4

In Package, you don't even need to reload your Page, just change your language before the window loads.

PixPin_2025-03-14_14-08-06.mp4

[ghost1372]

@ChenYiLins you need to refresh your Frame. after changing your language, clear backstack and reload your page.

Frame.BackStack.Clear();

// Reload the page that you want to have the new language
Frame.Navigate(typeof(MainPage));

In fact, I tried what you said, and it didn't work, the ToggleSwitch's On/Off Text is still not in English.

Unpackage:

PixPin_2025-03-14_13-59-27.mp4
In Package, you don't even need to reload your Page, just change your language before the window loads.

PixPin_2025-03-14_14-08-06.mp4

Everythings is working fine in UnPackaged. mybe your code is wrong!

[ghost1372]

@ChenYiLins I think I misunderstood what you meant. you want to load default language at startup in unpackaged?
This is probably because in packaged mode, language information is stored by ApplicationData.Current.LocalSettings and is retrieved properly when app launched. However, in unpackaged mode, since there is no package identity so ApplicationData.Current.LocalSettings does not work, this operation must be performed by the programmer himself.

you can store your language and when launching app set default language.

public App()
{
    this.InitializeComponent();
    Microsoft.Windows.Globalization.ApplicationLanguages.PrimaryLanguageOverride = mySetting.Language;

}

[ChenYiLins]

@ghost1372 I think I know what the problem is. If you set a x:Uid for the ToggleSwitch and set different On/Off Content under different language resource files, the method you described is really effective.
But the problem is that when you don't set On/Off Content for ToggleSwitch, it should display On and Off by default (In English) , and it will have a default text regardless of any language setting. This default text can't be change when you set language on Unpackage.

[Jay-o-Way]

Yep