MvvmCross localization plugin dynamic key searching + sublanguage support + EmbeddedResource support in PCL + Grid resource format support

AboutViewModel.cs

using System.Windows.Input;
using Cirrious.MvvmCross.Commands;
using Cirrious.MvvmCross.Localization.Interfaces;
using Cirrious.MvvmCross.Localization;


namespace Cirrious.Conference.Core.ViewModels
{
    public class AboutViewModel
        : BaseConferenceViewModel
    {
        public LocalizationBag CustomBag { get { return new LocalizationBag() { LanguageBinder = TextSource, StringToFind = "StuartLinkText" }; } }

        public ICommand ContactSlodgeCommand
        {
            get
            {
                return
                    new MvxRelayCommand(
                        () =>
                        ComposeEmail("me@slodge.com", "About MvvmCross and the SQL Bits app", "I've got a question"));
            }
        }

        public ICommand MvvmCrossOnGithubCommand
        {
            get
            {
                return
                    new MvxRelayCommand(
                        () =>
                        ShowWebPage("http://github.com/slodge/mvvmcross"));
            }
        }

        public ICommand ShowSqlBitsCommand
        {
            get
            {
                return
                    new MvxRelayCommand(
                        () =>
                        ShowWebPage("http://sqlbits.com"));
            }
        }
        
        public ICommand MonoTouchCommand
        {
            get
            {
                return
                    new MvxRelayCommand(
                        () =>
                        ShowWebPage("http://ios.xamarin.com"));
            }
        }

        public ICommand MonoDroidCommand
        {
            get
            {
                return
                    new MvxRelayCommand(
                        () =>
                        ShowWebPage("http://android.xamarin.com"));
            }
        }
    }
}

BaseConferenceApp.cs

using Cirrious.MvvmCross.Application;
using Cirrious.MvvmCross.ExtensionMethods;
using Cirrious.MvvmCross.Interfaces.ServiceProvider;
using Cirrious.MvvmCross.Interfaces.ViewModels;
using Cirrious.MvvmCross.Localization.Interfaces;

namespace Cirrious.Conference.Core
{
    public abstract class BaseConferenceApp 
        : MvxApplication
        , IMvxServiceProducer<IMvxStartNavigation>
        , IMvxServiceProducer<IMvxTextProvider>
        , IMvxServiceProducer<IConferenceService>
        , IMvxServiceProducer<ITwitterSearchProvider>
        , IMvxServiceProducer<IErrorReporter>
        , IMvxServiceProducer<IErrorSource>
    {
        protected BaseConferenceApp(string Language)
        {
            InitialisePlugins();
            InitialiseText(Language);
            InitialiseServices();
            InitaliseErrorSystem();
        }

        private void InitialisePlugins()
        {
            Cirrious.MvvmCross.Plugins.File.PluginLoader.Instance.EnsureLoaded();
            Cirrious.MvvmCross.Plugins.JsonLocalisation.PluginLoader.Instance.EnsureLoaded();
            Cirrious.MvvmCross.Plugins.ResourceLoader.PluginLoader.Instance.EnsureLoaded();

            // these don't really need to be loaded on startup, but it's convenient for now
            Cirrious.MvvmCross.Plugins.Email.PluginLoader.Instance.EnsureLoaded();
            Cirrious.MvvmCross.Plugins.PhoneCall.PluginLoader.Instance.EnsureLoaded();
            Cirrious.MvvmCross.Plugins.Share.PluginLoader.Instance.EnsureLoaded();
            Cirrious.MvvmCross.Plugins.Visibility.PluginLoader.Instance.EnsureLoaded();
            Cirrious.MvvmCross.Plugins.WebBrowser.PluginLoader.Instance.EnsureLoaded();
        }

        private void InitaliseErrorSystem()
        {
            var errorHub = new ErrorApplicationObject();
            this.RegisterServiceInstance<IErrorReporter>(errorHub);
            this.RegisterServiceInstance<IErrorSource>(errorHub);
        }

        private void InitialiseServices()
        {
            var repository = new ConferenceService();
            Cirrious.MvvmCross.Plugins.File.PluginLoader.Instance.EnsureLoaded();
            this.RegisterServiceInstance<IConferenceService>(repository);
            this.RegisterServiceInstance<ITwitterSearchProvider>(new TwitterSearchProvider());
        }

        private void InitialiseText(string Language)
        {
            var builder = new TextProviderBuilder();
            // TODO - could choose a language here: builder.LoadResources(whichLanguage);
            //builder.LoadResources("fr-ca");
            //builder.LoadResources(Language);
            builder.LoadEmbeddedResources(Language,false);
            System.Diagnostics.Debug.WriteLine("Language:" + Language);
            this.RegisterServiceInstance<IMvxTextProvider>(builder.TextProvider);
        }

        protected abstract void InitialiseStartNavigation();
    }

    public class ConferenceApp
        : BaseConferenceApp
    {
        public ConferenceApp(string Language):base(Language)
        {
            InitialiseStartNavigation();
        }

        protected sealed override void InitialiseStartNavigation()
        {
            var startApplicationObject = new StartApplicationObject(true);
            this.RegisterServiceInstance<IMvxStartNavigation>(startApplicationObject);
        }
    }

    public class NoSplashScreenConferenceApp
        : BaseConferenceApp
    {
        public NoSplashScreenConferenceApp(string Language)
            : base(Language)
        {
            InitialiseStartNavigation();
        }

        protected sealed override void InitialiseStartNavigation()
        {
            var startApplicationObject = new StartApplicationObject(false);
            this.RegisterServiceInstance<IMvxStartNavigation>(startApplicationObject);
        }
    }
}

IMvxJsonDictionaryTextLoader.cs

#region Copyright
// <copyright file="IMvxJsonDictionaryTextLoader.cs" company="Cirrious">
// (c) Copyright Cirrious. http://www.cirrious.com
// This source is subject to the Microsoft Public License (Ms-PL)
// Please see license.txt on http://opensource.org/licenses/ms-pl.html
// All other rights reserved.
// </copyright>
// 
// Project Lead - Stuart Lodge, Cirrious. http://www.cirrious.com
#endregion
using System.Collections.Generic;
namespace Cirrious.MvvmCross.Plugins.JsonLocalisation
{
    public interface IMvxJsonDictionaryTextLoader
    {
        void LoadJsonFromResource(string namespaceKey, string typeKey, string resourcePath);
        void LoadJsonFromText(string namespaceKey, string typeKey, string rawJson);

        void LoadJsonFromEmbeddedResource(string namespaceKey, string typeKey, string resourcePath, bool IsFolderStructure, string whichLocalisationFolder);
        List<string> GetSupportedLanguagesFromPackedEmbeddedResource(string namespaceKey, string typeKey, string resourcePath);
    }
}

IMvxTextProviderBuilder.cs

#region Copyright
// <copyright file="IMvxTextProviderBuilder.cs" company="Cirrious">
// (c) Copyright Cirrious. http://www.cirrious.com
// This source is subject to the Microsoft Public License (Ms-PL)
// Please see license.txt on http://opensource.org/licenses/ms-pl.html
// All other rights reserved.
// </copyright>
// 
// Project Lead - Stuart Lodge, Cirrious. http://www.cirrious.com
#endregion

using System.Collections.Generic;
namespace Cirrious.MvvmCross.Plugins.JsonLocalisation
{
    public interface IMvxTextProviderBuilder
    {
        MvxJsonDictionaryTextProvider TextProvider { get; }
        void LoadResources(string whichLocalisationFolder);

        void LoadEmbeddedResources(string whichLocalisationFolder,bool IsFolderStructure);
        List<string> GetSupportedLanguagesFromPackedEmbeddedResource();
    }
}

LocalizationBag.cs

using System;
using Cirrious.MvvmCross.Exceptions;
using Cirrious.MvvmCross.ExtensionMethods;
using Cirrious.MvvmCross.Interfaces.ServiceProvider;
using Cirrious.MvvmCross.Localization.Interfaces;

namespace Cirrious.MvvmCross.Localization
{
    public class LocalizationBag 
    {
        public IMvxLanguageBinder LanguageBinder { get; set; }
        public string StringToFind { get; set; }
    }
}

MvxDictionaryBaseTextProvider.cs

#region Copyright
// <copyright file="MvxDictionaryBaseTextProvider.cs" company="Cirrious">
// (c) Copyright Cirrious. http://www.cirrious.com
// This source is subject to the Microsoft Public License (Ms-PL)
// Please see license.txt on http://opensource.org/licenses/ms-pl.html
// All other rights reserved.
// </copyright>
// 
// Project Lead - Stuart Lodge, Cirrious. http://www.cirrious.com
#endregion

using System.Collections.Generic;
using Cirrious.MvvmCross.Platform.Diagnostics;

namespace Cirrious.MvvmCross.Plugins.JsonLocalisation
{
    public class MvxDictionaryBaseTextProvider : MvxBaseTextProvider
    {
        private readonly Dictionary<string, string> _entries = new Dictionary<string, string>();
        private readonly bool _maskErrors;

        public MvxDictionaryBaseTextProvider(bool maskErrors)
        {
            _maskErrors = maskErrors;
        }
        protected void AddOrReplace(string namespaceKey, string typeKey, string name, string value)
        {
            var key = MakeLookupKey(namespaceKey, typeKey, name);
            _entries[key] = value;
        }

        #region Implementation of IMvxTextProvider

        public override string GetText(string namespaceKey, string typeKey, string name)
        {
            var key = MakeLookupKey(namespaceKey, typeKey, name);
            string value;
            if (_entries.TryGetValue(key, out value))
                return value;

            MvxTrace.Trace("Text value missing for " + key);
            if (_maskErrors)
            {
#if DEBUG
                return key;
#else
                return "";
#endif
            }

            throw new KeyNotFoundException("Could not find text lookup for " + key);
        }

        #endregion
    }
}

MvxJsonDictionaryTextProvider.cs

#region Copyright
// <copyright file="MvxJsonDictionaryTextProvider.cs" company="Cirrious">
// (c) Copyright Cirrious. http://www.cirrious.com
// This source is subject to the Microsoft Public License (Ms-PL)
// Please see license.txt on http://opensource.org/licenses/ms-pl.html
// All other rights reserved.
// </copyright>
// 
// Project Lead - Stuart Lodge, Cirrious. http://www.cirrious.com
#endregion

using System.Collections.Generic;
using System.IO;
using Cirrious.MvvmCross.ExtensionMethods;
using Cirrious.MvvmCross.Interfaces.Platform;
using Cirrious.MvvmCross.Interfaces.ServiceProvider;
using Cirrious.MvvmCross.Plugins.Json;
using Cirrious.MvvmCross.Plugins.ResourceLoader;
using System.Reflection;
using System;
using System.Linq;

namespace Cirrious.MvvmCross.Plugins.JsonLocalisation
{
    public class MvxJsonDictionaryTextProvider 
        : MvxDictionaryBaseTextProvider
        , IMvxJsonDictionaryTextLoader
        , IMvxServiceConsumer<IMvxResourceLoader>
        , IMvxServiceConsumer<IMvxJsonConverter>
    {
        public MvxJsonDictionaryTextProvider(bool maskErrors)
            : base(maskErrors)
        {            
        }

        private IMvxJsonConverter JsonConvert
        {
            get
            {
                return this.GetService<IMvxJsonConverter>(); 
            }
        }

        #region IMvxJsonDictionaryTextLoader Members

        public void LoadJsonFromResource(string namespaceKey, string typeKey, string resourcePath)
        {
            var service = this.GetService<IMvxResourceLoader>();
            var json = service.GetTextResource(resourcePath);
            if (string.IsNullOrEmpty(json))
                throw new FileNotFoundException("Unable to find resource file " + resourcePath);
            LoadJsonFromText(namespaceKey, typeKey, json);
        }

        public void LoadJsonFromText(string namespaceKey, string typeKey, string rawJson)
        {
            var entries  = JsonConvert.DeserializeObject<Dictionary<string, string>>(rawJson);
            foreach (var kvp in entries)
            {
                AddOrReplace(namespaceKey, typeKey, kvp.Key, kvp.Value);
            }
        }

        public void LoadJsonFromEmbeddedResource(string namespaceKey, string typeKey, string resourcePath, bool IsFolderStructure, string whichLocalisationFolder)
        {
            var json = getTextFromEmbeddedResource(namespaceKey,resourcePath);
            if (string.IsNullOrEmpty(json))
                throw new FileNotFoundException("Unable to find resource file " + resourcePath);
            LoadJsonFromText(namespaceKey, typeKey, json,IsFolderStructure,whichLocalisationFolder);
        }

        public void LoadJsonFromText(string namespaceKey, string typeKey, string rawJson, bool IsFolderStructure, string whichLocalisationFolder)
        {
            if (IsFolderStructure)
                LoadJsonFromText(namespaceKey, typeKey, rawJson);
            else
            {
                var entries = JsonConvert.DeserializeObject<Dictionary<string,List<string>>>(rawJson);
                if (entries.Count <2)
                    return;
                List<string> languageColumn = null;
                entries.TryGetValue(whichLocalisationFolder, out languageColumn);
                if (languageColumn == null)
                    return;
                var textColumn = entries.ElementAt(0).Value;

                for (int i = 0; i < textColumn.Count; i++)
                {
                    AddOrReplace(namespaceKey, typeKey, textColumn[i], languageColumn[i]);
                }
                //foreach (var kvp in entries)
                //{
                //    if (kvp.Key==whichLocalisationFolder)
                //    AddOrReplace(namespaceKey, typeKey, kvp.Key, kvp.Value);
                //}
            }
        }

        public List<string> GetSupportedLanguagesFromPackedEmbeddedResource(string namespaceKey, string typeKey, string resourcePath)
        {
            var json = getTextFromEmbeddedResource(namespaceKey, resourcePath);
            List<string> supportedLanguages = new List<string>() ;
            if (string.IsNullOrEmpty(json))
                return supportedLanguages;
                //throw new FileNotFoundException("Unable to find resource file " + resourcePath);
            var entries = JsonConvert.DeserializeObject<Dictionary<string, List<string>>>(json);
            if (entries.Count < 2)
                return supportedLanguages;
            for (int i = 1; i < entries.Count; i++)
            {
                supportedLanguages.Add(entries.ElementAt(i).Key);
            }
            return supportedLanguages;
        }

        string getTextFromEmbeddedResource(string namespaceKey, string resourcePath)
        {
            string path = namespaceKey+"." + resourcePath.Replace("/", ".");
            try
            {
                string text = null;
                Stream stream = Assembly.Load(namespaceKey).GetManifestResourceStream(path);
                if (stream == null)
                    return null;
                
                using (var textReader = new StreamReader(stream))
                {
                    text = textReader.ReadToEnd();
                }

                return text;
            }
            //#if !NETFX_CORE
            //            catch (ThreadAbortException)
            //            {
            //                throw;
            //            }
            //#endif 
            catch (Exception ex)
            {

                throw ex.MvxWrap("Cannot load resource {0}", path);
            }
        }

        #endregion
    }
}

MvxLanguageBinderConverter.cs

#region Copyright
// <copyright file="MvxLanguageBinderConverter.cs" company="Cirrious">
// (c) Copyright Cirrious. http://www.cirrious.com
// This source is subject to the Microsoft Public License (Ms-PL)
// Please see license.txt on http://opensource.org/licenses/ms-pl.html
// All other rights reserved.
// </copyright>
// 
// Project Lead - Stuart Lodge, Cirrious. http://www.cirrious.com
#endregion

using System;
using System.Globalization;
using Cirrious.MvvmCross.Converters;
using Cirrious.MvvmCross.Localization.Interfaces;

namespace Cirrious.MvvmCross.Localization.Converters
{
    public class MvxLanguageBinderConverter 
        : MvxBaseValueConverter
    {
        #region Implementation of IValueConverter

        public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
              string key = null;
              var binder = value as IMvxLanguageBinder;
              if (binder != null)
              {
                  if (parameter != null)
                  {
                      key = parameter.ToString();
                      return binder.GetText(key);
                  }
              }
              else
              {
                  var binderBag = value as LocalizationBag;
                  if (binderBag != null)
                  {
                      if (binderBag.StringToFind !=null)
                      {
                          key = binderBag.StringToFind;
                          return binderBag.LanguageBinder.GetText(key);
                      }
                  }
              }
                
            return null;
        }

        #endregion
    }
}

MvxTextProviderBuilder.cs

#region Copyright
// <copyright file="MvxTextProviderBuilder.cs" company="Cirrious">
// (c) Copyright Cirrious. http://www.cirrious.com
// This source is subject to the Microsoft Public License (Ms-PL)
// Please see license.txt on http://opensource.org/licenses/ms-pl.html
// All other rights reserved.
// </copyright>
// 
// Project Lead - Stuart Lodge, Cirrious. http://www.cirrious.com
#endregion

using System;
using System.Collections.Generic;
using Cirrious.MvvmCross.ExtensionMethods;
using Cirrious.MvvmCross.Interfaces.Platform.Diagnostics;
using Cirrious.MvvmCross.Platform.Diagnostics;

namespace Cirrious.MvvmCross.Plugins.JsonLocalisation
{
    public abstract class MvxTextProviderBuilder 
        : IMvxTextProviderBuilder
    {
        private readonly string _generalNamespaceKey;
        private readonly string _rootFolderForResources;

        protected MvxTextProviderBuilder(string generalNamespaceKey, string rootFolderForResources)
        {
#warning Error masking turned on by default - check this is OK
            _generalNamespaceKey = generalNamespaceKey;
            _rootFolderForResources = rootFolderForResources;

            TextProvider = new MvxJsonDictionaryTextProvider(true);
            LoadEmbeddedResources(string.Empty,false);
        }

        protected abstract IDictionary<string, string> ResourceFiles { get; }

        #region IMvxTextProviderBuilder Members

        public MvxJsonDictionaryTextProvider TextProvider { get; private set; }

        public void LoadResources(string whichLocalisationFolder)
        {
            loadResourcesSelector(whichLocalisationFolder, false,true);
        }

        public void LoadEmbeddedResources(string whichLocalisationFolder,bool IsFolderStructure)
        {
            loadResourcesSelector(whichLocalisationFolder, true,IsFolderStructure);
        }

        void loadResourcesSelector(string whichLocalisationFolder, bool EmbeddedResource, bool IsFolderStructure)
        {
            bool isSubLanguage = whichLocalisationFolder.Contains("-");
            string standardLocalisationFolder = isSubLanguage ? whichLocalisationFolder.Substring(0, whichLocalisationFolder.IndexOf("-")) : whichLocalisationFolder;

            loadResources(standardLocalisationFolder,EmbeddedResource,IsFolderStructure);

            if (isSubLanguage)
            {
                loadResources(whichLocalisationFolder, EmbeddedResource, IsFolderStructure);
            }
        }

        void loadResources(string whichLocalisationFolder, bool EmbeddedResource, bool IsFolderStructure)
        {

            foreach (var kvp in ResourceFiles)
            {
                try
                {
                    if (EmbeddedResource)
                        TextProvider.LoadJsonFromEmbeddedResource(_generalNamespaceKey, kvp.Key, GetResourceFilePath("", kvp.Value), IsFolderStructure, whichLocalisationFolder);
                    else
                        TextProvider.LoadJsonFromResource(_generalNamespaceKey, kvp.Key, GetResourceFilePath(whichLocalisationFolder, kvp.Value));
                }
#if !NETFX_CORE
                //catch (ThreadAbortException)
                //{
                //    throw;
                //}
#endif
                catch (Exception exception)
                {
                    MvxTrace.Trace(MvxTraceLevel.Warning, "Language file could not be loaded for {0}.{1} - {2}", whichLocalisationFolder, kvp.Key, exception.ToLongString());
                }
            }
        }

        public List<string> GetSupportedLanguagesFromPackedEmbeddedResource()
        {
            List<string> supportedLanguages = new List<string>();
            foreach (var kvp in ResourceFiles)
            {
                List<string> languages = TextProvider.GetSupportedLanguagesFromPackedEmbeddedResource(_generalNamespaceKey, kvp.Key, GetResourceFilePath("", kvp.Value));
                foreach (var language in languages)
                {
                    if (!supportedLanguages.Contains(language))
                        supportedLanguages.Add(language);
                }
            }
            return supportedLanguages;
        }

        #endregion

        protected virtual string GetResourceFilePath(string whichLocalisationFolder, string whichFile)
        {
            if (string.IsNullOrEmpty(whichLocalisationFolder))
                return string.IsNullOrEmpty(_rootFolderForResources) ? string.Format("{0}.json", whichFile) : string.Format("{0}/{1}.json", _rootFolderForResources, whichFile);
            else
                return string.IsNullOrEmpty(_rootFolderForResources) ? string.Format("{0}/{1}.json", whichLocalisationFolder, whichFile) : string.Format("{0}/{1}/{2}.json", _rootFolderForResources, whichLocalisationFolder, whichFile);
        }

    }
}

Page_About.axml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:local="http://schemas.android.com/apk/res/com.cirrious.conference.sqlbits"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@color/transparent">
    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:padding="12dp"
            android:orientation="vertical">
            <TextView
                android:text="hello"
                style="@style/AboutPageTitle"
                android:id="@+id/textViewAboutPageTitle"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;CustomBag&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;SQLBitsXApp&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;AboutSQLBitsXApp&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_email"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;StuartLinkText&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;ContactSlodgeCommand&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;Disclaimer&apos;}}" />
            <TextView
                style="@style/AboutPageTitle"
                android:text="hello world"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;SQLBitsX&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;AboutSQLBitsX&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_link"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;SQLBitsLinkText&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;ShowSqlBitsCommand&apos;}}" />
            <TextView
                style="@style/AboutPageTitle"
                android:text="hello world"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;SQLBits&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;AboutSQLBits&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_link"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;SQLBitsLinkText&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;ShowSqlBitsCommand&apos;}}" />
            <TextView
                style="@style/AboutPageTitle"
                android:text="hello world"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;MvvmCross&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;AboutMvvmCross&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_email"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;StuartLinkText&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;ContactSlodgeCommand&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;ForMvvmSource&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_link"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;MvvmCrossLinkText&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;MvvmCrossOnGithubCommand&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;ForXamarin&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_link"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;MonoTouch&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;MonoTouchCommand&apos;}}" />
            <Button
                style="@style/IconButton"
                android:drawableLeft="@drawable/appbar_link"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;MonoForAndroid&apos;},&apos;Click&apos;:{&apos;Path&apos;:&apos;MonoDroidCommand&apos;}}" />
            <TextView
                android:text="hello"
                style="@style/AboutPageBodyText"
                local:MvxBind="{&apos;Text&apos;:{&apos;Path&apos;:&apos;TextSource&apos;,&apos;Converter&apos;:&apos;Language&apos;,&apos;ConverterParameter&apos;:&apos;DisclaimerMono&apos;}}" />
        </LinearLayout>
    </ScrollView>
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:src="@drawable/tweetShare"
        local:MvxBind="{&apos;Click&apos;:{&apos;Path&apos;:&apos;ShareGeneralCommand&apos;}}" />
</RelativeLayout>

Support for this json format:
{
"Text":["string1","string2","string3"],
"":["string1 en","string2 en","string3 en"],
"fr":["string1 fr","string2 fr","string3 in French"],
"fr-be":["string1 fr-be","string2 fr-be","string3 fr-be"]
}
With little effort, one can open excel,add a column language, modify the values then export to json.