https://github.com/umbraco/Umbraco-CMS/pull/9248>

- Removed BackOfficeArea
- Injected IEmailSender
- Uses nameof instead of magic strings
- Uses GetControllerName instead of magic strings

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Core/PublishedCache/DefaultCultureAccessor.cs

@@ -1,4 +1,6 @@
-using Umbraco.Core;
+using Microsoft.Extensions.Options;
+using Umbraco.Core;
+using Umbraco.Core.Configuration.Models;
 using Umbraco.Core.Services;
 
 namespace Umbraco.Web.PublishedCache
@@ -9,21 +11,22 @@ namespace Umbraco.Web.PublishedCache
     public class DefaultCultureAccessor : IDefaultCultureAccessor
     {
         private readonly ILocalizationService _localizationService;
+        private readonly IOptions<GlobalSettings> _options;
         private readonly RuntimeLevel _runtimeLevel;
 
         /// <summary>
         /// Initializes a new instance of the <see cref="DefaultCultureAccessor"/> class.
         /// </summary>
-        public DefaultCultureAccessor(ILocalizationService localizationService, IRuntimeState runtimeState)
+        public DefaultCultureAccessor(ILocalizationService localizationService, IRuntimeState runtimeState, IOptions<GlobalSettings> options)
         {
             _localizationService = localizationService;
+            _options = options;
             _runtimeLevel = runtimeState.Level;
         }
 
         /// <inheritdoc />
         public string DefaultCulture => _runtimeLevel == RuntimeLevel.Run
             ? _localizationService.GetDefaultLanguageIsoCode() ?? "" // fast
-            // TODO: Shouldn't this come from GlobalSettings.DefaultUILanguage?
-            : "en-US"; // default for install and upgrade, when the service is n/a
+            : _options.Value.DefaultUILanguage; // default for install and upgrade, when the service is n/a
     }
 }