Fixed: Filtering editions by language

src/NzbDrone.Core/Profiles/Metadata/MetadataProfileService.cs

@@ -181,7 +181,7 @@ namespace NzbDrone.Core.Profiles.Metadata
             var localHash = new HashSet<string>(localEditions.Where(x => x.ManualAdd).Select(x => x.ForeignEditionId));
             localHash.UnionWith(localFiles.Select(x => x.Edition.Value.ForeignEditionId));
 
-            FilterByPredicate(hash, x => x.ForeignEditionId, localHash, profile, (x, p) => !allowedLanguages.Any() || allowedLanguages.Contains(x.Language?.CanonicalizeLanguage() ?? "null"), "edition language not allowed");
+            FilterByPredicate(hash, x => x.ForeignEditionId, localHash, profile, (x, p) => !allowedLanguages.Any() || allowedLanguages.Contains(x.Language?.CanonicalizeLanguage()), "edition language not allowed");
             FilterByPredicate(hash, x => x.ForeignEditionId, localHash, profile, (x, p) => !p.SkipMissingIsbn || x.Isbn13.IsNotNullOrWhiteSpace() || x.Asin.IsNotNullOrWhiteSpace(), "isbn and asin is missing");
             FilterByPredicate(hash, x => x.ForeignEditionId, localHash, profile, (x, p) => !MatchesTerms(x.Title, p.Ignored), "contains ignored terms");
 

src/Readarr.Api.V1/Profiles/Metadata/MetadataProfileSchemaController.cs

@@ -12,7 +12,7 @@ namespace Readarr.Api.V1.Profiles.Metadata
         {
             var profile = new MetadataProfile
             {
-                AllowedLanguages = "eng, en-US, en-GB"
+                AllowedLanguages = "eng"
             };
 
             return profile.ToResource();