About language settings [suggestion]

[Jay-o-Way]

ref: #1074

1) We can investigate what it takes to apply a change in the app language during run-time.

Summary of Setup

Step	Required For Runtime Switching
files per language.resw	Yes
PrimaryLanguageOverride	Yes
Reload UI	Yes
Avoid x:Uid	Yes
ResourceLoaderUse	Yes
Declare languages in manifest	For packaged apps

Set the Language at Runtime
Use this API to override the app’s language:

Windows.Globalization.ApplicationLanguages.PrimaryLanguageOverride = "nl-NL";

This sets the language for the current session. But to apply it, you’ll need to reload the UI.

Reload the UI
You must clear the navigation stack and reload the root page:

var window = App.MainWindow;
window.Content = new MainPage();

This forces the UI to re-evaluate localized strings.

2) Improve OnLanguageChanged

Currently, the code checks value against ReadSettingAsync but since this is written every time the combo box changes, it does not compare against current app language. We could use

var currentCulture = System.Globalization.CultureInfo.CurrentUICulture;
// NativeName is like "Português (Brasil)"
// DisplayName is like "Portuguese (Brazil)"
// Name is like "pt-BR"

3) Choose preferred app language as default (for new users)

Use Windows.Globalization.ApplicationLanguages.Languages: This gives you the ranked list of preferred languages from the user's Windows settings.

[Jay-o-Way]

I'm currently trying things about changing the code related to the Language ComboBox. Using less hard-coded strings. In this process, the language setting (format) is changed, from a string to a language code, like en or pt-br etc. This is much more simple and reliable.

This also means

• LanguageTranscoding can be removed.
• Changes to different places.
  • Example: Microsoft.Windows.Globalization.ApplicationLanguages.PrimaryLanguageOverride = language.Replace("\"", "")
• Updating every ReadSettingAsync<string>("Language") and SaveSettingAsync("Language", ...).

[Spiritreader]

Sounds good, the implementation of language switching has been kind of jank, including but not limited to issues with WPF.
Making it a bit less dependent on hardcoded strings and improve the feel when the language is switched is a nice QoL improvement.

If dynamic reloading works, that would be quite nice.