Starts wiring up the language editor with the controller, ensure that you cannot delete a language at the repo level and makes sure that we return and show validation messages when the user tries to delete the default or last language.

src/Umbraco.Web/Models/Mapping/LanguageMapperProfile.cs

@@ -0,0 +1,20 @@
+using System.Globalization;
+using AutoMapper;
+using Umbraco.Core.Models;
+using Umbraco.Web.Models.ContentEditing;
+
+namespace Umbraco.Web.Models.Mapping
+{
+    internal class LanguageMapperProfile : Profile
+    {
+        public LanguageMapperProfile()
+        {
+            CreateMap<ILanguage, LanguageDisplay>()
+                .ForMember(l => l.Name, expression => expression.MapFrom(x => x.CultureInfo.DisplayName));
+
+            CreateMap<CultureInfo, Culture>()
+                .ForMember(c => c.Name, expression => expression.MapFrom(x => x.DisplayName))
+                .ForMember(c => c.IsoCode, expression => expression.MapFrom(x => x.Name));
+        }
+    }
+}