Hey there! This time I gonna explain how to add localization support in your AvaloniaUI app. As always I'm using my app called Camelot as good working example.

What is localization and why do we need it

Localization is a process of adding support for different locales in your app. Locales always include language, date/time formats etc. It allows users from multiple countries use your app in their native language.

How to localize AvaloniaUI app

Create resources

First step is to create set of resources files like here. It could be done automatically via IDE. Resources.resx is the main file with default culture translations inside, IDE also autogenerates Resources.Designer.cs class based on it. This class could be used in code if needed. Other *.resx files contain translations for different cultures etc. Please note that for same language it's possible to keep many locales, like en-US and en-GB.

Integrate resources into views

Resources could be used as static objects in views. Translation for current locale will be shown. Here is an example how to use them:

<ToolTip.Tip>
    <TextBlock Classes="mainWindowTextBlock" Text="{x:Static p:Resources.GoBack}" />
</ToolTip.Tip>

Add language selection logic

For usability it's good to provide ability to select language in UI. All you need on backend in this case is to set current culture:

Thread.CurrentThread.CurrentUICulture = CultureInfo.GetCultureInfo(languageCode);

See LanguageManager for more info

Add translations

IDE support adding resources over UI:

Tips: use clear translation string names. If text is too long don't try to put full text in resource name. If you have resource that ends with colon I recommend to name it ...WithColon because you might need similar resource w/o colon later and adding : in view to your text won't work for some locales as expected.

Conclusion

In this post I described process of localization AvaloniaUI app. It's pretty straight-forward process. Feel free to contact me in comments if you have any questions!