Treat subbed as unknown language (#5677)

* Subbed releases shouldn't report as different lang

* Add tests for subbed releases

* Remove whitespace

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

@@ -173,6 +173,16 @@ namespace NzbDrone.Core.Test.ParserTests
             result.Languages.Should().BeEquivalentTo(Language.Polish);
         }
 
+        [TestCase("Pulp.Fiction.1994.PL-SUB.1080p.XviD-LOL")]
+        [TestCase("Pulp.Fiction.1994.PLSUB.1080p.XviD-LOL")]
+        [TestCase("Pulp.Fiction.1994.SUB-PL.1080p.XviD-LOL")]
+        public void should_parse_language_polish_subbed(string postTitle)
+        {
+            var result = Parser.Parser.ParseMovieTitle(postTitle, true);
+
+            result.Languages.Should().BeEquivalentTo(Language.Unknown);
+        }
+
         [TestCase("Pulp.Fiction.1994.Vietnamese.1080p.XviD-LOL")]
         public void should_parse_language_vietnamese(string postTitle)
         {

src/NzbDrone.Core/Parser/LanguageParser.cs

@@ -17,7 +17,7 @@ namespace NzbDrone.Core.Parser
         private static readonly Regex LanguageRegex = new Regex(@"(?:\W|_|^)(?<italian>\b(?:ita|italian)\b)|(?<german>\b(?:german|videomann|ger)\b)|(?<flemish>flemish)|(?<bulgarian>bgaudio)|(?<brazilian>dublado)|(?<greek>greek)|(?<french>(?:\W|_)(?:FR|VO|VFF|VFQ|VFI|VF2|TRUEFRENCH)(?:\W|_))|(?<russian>\brus\b)|(?<english>\beng\b)|(?<hungarian>\b(?:HUNDUB|HUN)\b)|(?<hebrew>\bHebDub\b)|(?<polish>\b(?:PL\W?DUB|DUB\W?PL|LEK\W?PL|PL\W?LEK)\b)|(?<chinese>\[(?:CH[ST]|BIG5|GB)\]|简|繁|字幕)",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
-        private static readonly Regex CaseSensitiveLanguageRegex = new Regex(@"(?<lithuanian>\bLT\b)|(?<czech>\bCZ\b)|(?<polish>\bPL\b)",
+        private static readonly Regex CaseSensitiveLanguageRegex = new Regex(@"(?:(?i)(?<!SUB[\W|_|^]))(?:(?<lithuanian>\bLT\b)|(?<czech>\bCZ\b)|(?<polish>\bPL\b))(?:(?i)(?![\W|_|^]SUB))",
                                                                 RegexOptions.Compiled);
 
         private static readonly Regex SubtitleLanguageRegex = new Regex(".+?[-_. ](?<iso_code>[a-z]{2,3})(?:[-_. ]forced)?$", RegexOptions.Compiled | RegexOptions.IgnoreCase);