New: Detect 'castellano' as Spanish Language

Fixes #6152

src/NzbDrone.Core.Test/ParserTests/LanguageParserFixture.cs

@@ -44,6 +44,9 @@ namespace NzbDrone.Core.Test.ParserTests
         }
 
         [TestCase("Movie.Title.1994.Spanish.1080p.XviD-LOL")]
+        [TestCase("Movie Title (2020)[BDRemux AVC 1080p][E-AC3 DD Plus 5.1 Castellano-Inglés Subs]")]
+        [TestCase("Movie Title (2020) [UHDRemux2160p HDR][DTS-HD MA 5.1 AC3 5.1 Castellano - True-HD 7.1 Atmos Inglés Subs]")]
+        [TestCase("Movie Title (2016) [UHDRemux 2160p SDR] [Castellano DD 5.1 - Inglés DTS-HD MA 5.1 Subs]")]
         public void should_parse_language_spanish(string postTitle)
         {
             var result = Parser.Parser.ParseMovieTitle(postTitle, true);

src/NzbDrone.Core/Parser/LanguageParser.cs

@@ -37,7 +37,7 @@ namespace NzbDrone.Core.Parser
                 languages.Add(Language.French);
             }
 
-            if (lowerTitle.Contains("spanish"))
+            if (lowerTitle.Contains("spanish") || lowerTitle.Contains("castellano"))
             {
                 languages.Add(Language.Spanish);
             }