How to change xamarin application language

Question

I have a multilanguage application (English, french, dutch) that works with the default system language.
How can i change the language of the application after selecting the language from a Combobox?

Answer 1

Hi AnasGuibene,

Welcome to our Microsoft Q&A platform!

To achieve multilanguage in Xamarin.Forms, you can use Xamarin Community Toolkit TranslateExtension.

Here are the steps you can refer to.

First, create the resource file for each language and add "Name-Value" pair to it.

AppResource.es.resx

AppResource.es.resx

Second, modify the App.xaml.cs as follows.

public App()  
{  
    InitializeComponent();  
  
    LocalizationResourceManager.Current.PropertyChanged += Current_PropertyChanged;  
    LocalizationResourceManager.Current.Init(AppResource.ResourceManager);  
  
    MainPage = new MainPage();  
}  
  
private void Current_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)  
{  
    AppResource.Culture = LocalizationResourceManager.Current.CurrentCulture;  
}  

And here is the view "MainPage.xaml"

<ContentPage.BindingContext>  
    <local:MainPageViewModel/>  
</ContentPage.BindingContext>  

<StackLayout>  
    <Label Text="{xct:Translate Content}"/>  
    <Button Text="{xct:Translate ChangeLanguage}" Command="{Binding ChangeLanguageCommand}" />  
</StackLayout>  

Last, create the viewmodel for MainPage.

class MainPageViewModel  
{  
    public class LanguagePair  
    {  
        public Func<string> name;  
        public string value;  
    }  
  
    public MainPageViewModel()  
    {  
        CurrentLanguage = new LocalizedString(() => GetCurrentLanguageName());  
  
        ChangeLanguageCommand = new AsyncCommand(ChangeLanguage);  
        languageMapping = new List<LanguagePair>();  
        languageMapping.Add(new LanguagePair { name = () => AppResource.English, value = "en" });  
        languageMapping.Add(new LanguagePair { name = () => AppResource.Spanish, value = "es" });  
    }  
  
    List<LanguagePair> languageMapping { get; }  
    public LocalizedString CurrentLanguage { get; }  
    public ICommand ChangeLanguageCommand { get; }  
    private string GetCurrentLanguageName()  
    {  
        string name = languageMapping.SingleOrDefault(m => m.value == LocalizationResourceManager.Current.CurrentCulture.TwoLetterISOLanguageName).name.ToString();  
  
        return name != null ? name : LocalizationResourceManager.Current.CurrentCulture.DisplayName;  
    }  
  
    async Task ChangeLanguage()  
    {  
        string selectedName = await Application.Current.MainPage.DisplayActionSheet(  
            AppResource.ChangeLanguage,  
            null, null,  
            languageMapping.Select(m => m.name()).ToArray());  
        if (selectedName == null)  
        {  
            return;  
        }  
  
        string selectedValue = languageMapping.Single(m => m.name() == selectedName).value;  
        LocalizationResourceManager.Current.CurrentCulture = selectedValue == null ? CultureInfo.CurrentCulture : new CultureInfo(selectedValue);  
    }  
}  

Regards,
Kyle

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Answer 2

I think you can take a look to this video: watch