MvvmCross Jsonlocalisation

App.cs

 public class App : MvxApplication
    {
        public override void Initialize()
        {
TextProviderBuilder.SetDefaultLanguage(language);

            TextProviderBuilder builder = new TextProviderBuilder(new AppJsonDictionaryTextProvider());
            Mvx.RegisterSingleton<IMvxTextProviderBuilder>(builder);
            Mvx.RegisterSingleton<IMvxTextProvider>(builder.TextProvider);
        }
    }

AppJsonDictionaryTextProvider.cs

public class AppJsonDictionaryTextProvider : MvxDictionaryTextProvider, IMvxJsonDictionaryTextLoader
    {
        protected IMvxResourceLoader ResourceLoader
        {
            get
            {
                return Mvx.Resolve<IMvxResourceLoader>();
            }
        }

        public AppJsonDictionaryTextProvider(bool maskErrors = true)
            : base(maskErrors)
        {
        }

        public void LoadJsonFromResource(string namespaceKey, string typeKey, string resourcePath)
        {
            IMvxResourceLoader resourceLoader = this.ResourceLoader;
            string textResource = resourceLoader.GetTextResource(resourcePath);
            if (string.IsNullOrEmpty(textResource))
            {
                throw new FileNotFoundException("Unable to find resource file " + resourcePath);
            }
            LoadJsonFromText(namespaceKey, typeKey, textResource);
        }

        public void LoadJsonFromText(string namespaceKey, string typeKey, string rawJson)
        {
            Dictionary<string, Dictionary<string, string>> dictionaries = Mvx.Resolve<IMvxJsonConverter>().DeserializeObject<Dictionary<string, Dictionary<string, string>>>(rawJson);
            foreach (KeyValuePair<string, Dictionary<string, string>> currentDictionary in dictionaries)
            {
                foreach (KeyValuePair<string, string> current in currentDictionary.Value)
                {
                    base.AddOrReplace(namespaceKey, currentDictionary.Key, current.Key, current.Value);
                }
            }
        }
    }

Explanation

File structure:

Core
	> Translation
		> en
			main.json
iOS
	> Link folder "Translation" to root of iOS project
	- Select right mouse on the "main.json" go to build action and select "Content"
Android
	> Assets
		> Link folder "Translation" to Assets folder
		- Select right mouse on the "main.json" go to build action and select "AndroidAsset"
		
Plugins used:
- JsonLocalisation
- ResourceLoader

Structure of json file "main.json":
{
 "LoginViewModel": {
        "Title": "Login",
        
        "TbxUsername.Hint": "Username",
        "TbxPassword.Hint": "Password",
        "BtnLogin.Text": "Login"
    },
    
    "SomeOtherViewModel": {
        "Title": "Login",
        
        "TbxUsername.Hint": "Username",
        "TbxPassword.Hint": "Password",
        "BtnLogin.Text": "Login"
    }
}

TextProviderBuilder.cs

public class TextProviderBuilder : MvxTextProviderBuilder
    {
        private static string DefaultLanguage;

        public TextProviderBuilder(BmmJsonDictionaryTextProvider provider)
            : base("AppNamespace", "Translation", provider, provider)
        {
        }

        public static void SetDefaultLanguage(string language)
        {
            DefaultLanguage = language;
        }

        public static string GetDefaultLanguage()
        {
            return DefaultLanguage;
        }

        /// <summary>
        /// Load a dictionary, containing the ViewModel and the file, that should be loaded for that ViewModel.
        /// </summary>
        protected override IDictionary<string, string> ResourceFiles
        {
            get
            {
                return new Dictionary<string, string>() { { "main", "main" } };
            }
        }

        protected override string GetResourceFilePath(string whichLocalisationFolder, string whichFile)
        {
            if (string.IsNullOrEmpty(whichLocalisationFolder))
            {
                whichLocalisationFolder = DefaultLanguage;
            }

            return base.GetResourceFilePath(whichLocalisationFolder, whichFile);
        }
    }