Add language field to indexers (#788)

src/Jackett/Controllers/AdminController.cs

@@ -232,6 +232,7 @@ namespace Jackett.Controllers
                     item["description"] = indexer.DisplayDescription;
                     item["configured"] = indexer.IsConfigured;
                     item["site_link"] = indexer.SiteLink;
+                    item["language"] = indexer.Language;
                     item["potatoenabled"] = indexer.TorznabCaps.Categories.Select(c => c.ID).Any(i => PotatoController.MOVIE_CATS.Contains(i));
 
                     var caps = new JObject();

src/Jackett/Indexers/BaseIndexer.cs

@@ -20,6 +20,7 @@ namespace Jackett.Indexers
         public string SiteLink { get; protected set; }
         public string DisplayDescription { get; protected set; }
         public string DisplayName { get; protected set; }
+        public string Language { get; protected set; }
         public string ID { get { return GetIndexerID(GetType()); } }
 
         public bool IsConfigured { get; protected set; }

src/Jackett/Indexers/CardigannIndexer.cs

@@ -169,6 +169,7 @@ namespace Jackett.Indexers
             SiteLink = Definition.Links[0]; // TODO: implement alternative links
             if (!SiteLink.EndsWith("/"))
                 SiteLink += "/";
+            Language = Definition.Language;
             TorznabCaps = TorznabUtil.CreateDefaultTorznabTVCaps(); // TODO implement caps
 
             // init config Data

src/Jackett/Indexers/IIndexer.cs

@@ -16,6 +16,7 @@ namespace Jackett.Indexers
 
         string DisplayName { get; }
         string DisplayDescription { get; }
+        string Language { get; }
         string ID { get; }
 
         TorznabCapabilities TorznabCaps { get; }