Localization JSON File

In the MauiProgram.cs file,

builder
    .UseMauiApp<App>()
    .UseMauiMarkupLocalization();

should be added.

In your main project you should have a language file of type json. The translation will be read from this file and imported. If you do not specify the path to the file(s) in the parameter (

builder
    .UseMauiApp<App>()
    .UseMauiMarkupLocalization();
  //.UseMauiMarkupLocalization(defaultLang:"en-US"); // or
  //.UseMauiMarkupLocalization(defaultLang:"en-US", "Loc1.json", "Loc2.json"); // or

), will look for a json file named Localization.json in the home directory.

if you give one or more parameters like

builder
    .UseMauiApp<App>()
    .UseMauiMarkupLocalization(filePaths: "Localization1.json", "Localization2.json", "/Languages/Temp1.json");

it will read json files in given file paths.

The critical point here is to select Build Action: MauiAsset for json files.

Proper json format:

{
  "Hello": {
    "tr-TR": "Merhaba Dünya!",
    "en-US": "Hello World!"
  },
  "Msg": {
    "tr-TR": "Deneme amaçlı yapılmıştır.",
    "en-US": "It was made for testing purposes."
  }
}

Instead of 'keyWord' keywords, you can use any word or phrase(s) you want. You don't have any Regex limitations.

You can also change the 'tr-TR' and 'en-US' language keys with words or sentences as you wish. But it is recommended to use expressions such as 'en-US', 'tr-TR', 'fr-FR'.

You can change the language of the system with the following statement: Translator.Instance.ChangeCulture(CultureInfo.GetCultureInfo("en-US"));

You can simply use

new Label()
.Text(e => e.Translate("Hello"))
.FontSize(32)
.CenterHorizontal()
.SemanticHeadingLevel(SemanticHeadingLevel.Level1),

new Label()
.Text(e => e.Translate("Msg"))
.FontSize(18)
.CenterHorizontal()
.SemanticDescription(e => e.Translate("Msg"))
.SemanticHeadingLevel(SemanticHeadingLevel.Level1),

new VerticalStackLayout()
.Center()
.Children(
    new RadioButton()
    .IsChecked(Translator.Instance.CurrentCulture.Name == "tr-TR")
    .Content("tr-TR")
    .OnCheckedChanged((sender, e) =>
    {
        Translator.Instance.ChangeCulture(CultureInfo.GetCultureInfo("tr-TR"));
    }),
    new RadioButton()
    .IsChecked(Translator.Instance.CurrentCulture.Name == "en-US")
    .Content("en-US")
    .OnCheckedChanged((sender, e) =>
    {
        Translator.Instance.ChangeCulture(CultureInfo.GetCultureInfo("en-US"));
    })
)

in the code.