Language parsing improvements and more languages

Fixed: Parsing of multiple languages
New: Add Romanian, Latvian, Persian, Catalan, Croatian, Serbian, Bosnian, Estonian, Tamil, Indonesian, Macedonian, Slovenian languages
New: Handle some ISO 639-2/B language codes

Closes #5112
Closes #5440
Closes #5494

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

@@ -22,7 +22,6 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("enus")]
         [TestCase("enusa")]
         [TestCase("wo")]
-        [TestCase("ca-IT")]
         [TestCase("fr-CA")]
         public void unknown_or_invalid_code_should_return_null(string isoCode)
         {
@@ -45,5 +44,12 @@ namespace NzbDrone.Core.Test.ParserTests
             var result = IsoLanguages.Find(isoCode);
             result.Should().Be(null);
         }
+
+        [TestCase("cze")]
+        public void should_lookup_cze_via_alternate_iso_code_mapping(string isoCode)
+        {
+            var result = IsoLanguages.Find(isoCode);
+            result.Language.Should().Be(Language.Czech);
+        }
     }
 }

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

@@ -1,4 +1,3 @@
-using System.Linq;
 using FluentAssertions;
 using NUnit.Framework;
 using NzbDrone.Core.Languages;
@@ -10,30 +9,6 @@ namespace NzbDrone.Core.Test.ParserTests
     [TestFixture]
     public class LanguageParserFixture : CoreTest
     {
-        [TestCase("Title.the.Series.2009.S01E14.English.HDTV.XviD-LOL")]
-        [TestCase("Series Title - S01E01 - Pilot.English.sub")]
-        [TestCase("Series Title - S01E01 - Pilot.english.sub")]
-        public void should_parse_language_english(string postTitle)
-        {
-            var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Should().Be(Language.English);
-        }
-
-        [TestCase("Spanish Killroy was Here S02E02 Flodden 720p AMZN WEB-DL DDP5 1 H 264-NTb")]
-        [TestCase("Title.the.Spanish.Series.S02E02.1080p.WEB.H264-CAKES")]
-        [TestCase("Title.the.Spanish.Series.S02E06.Field.of.Cloth.of.Gold.1080p.AMZN.WEBRip.DDP5.1.x264-NTb")]
-        [TestCase("Title.the.Series.2009.S01E14.Germany.HDTV.XviD-LOL")]
-        [TestCase("Title.the.Series.2009.S01E14.HDTV.XviD-LOL")]
-        [TestCase("Title.the.Italian.Series.S01E01.The.Family.720p.HDTV.x264-FTP")]
-        [TestCase("Title.the.Italy.Series.S02E01.720p.HDTV.x264-TLA")]
-        [TestCase("Series Title - S01E01 - Pilot.en.sub")]
-        [TestCase("Series Title - S01E01 - Pilot.eng.sub")]
-        public void should_parse_language_unknown(string postTitle)
-        {
-            var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Should().Be(Language.Unknown);
-        }
-
         [TestCase("Series Title - S01E01 - Pilot.sub")]
         public void should_parse_subtitle_language_unknown(string fileName)
         {
@@ -51,12 +26,37 @@ namespace NzbDrone.Core.Test.ParserTests
         [TestCase("Series Title - S01E01 - Pilot.en.sdh.sub")]
         [TestCase("Series Title - S01E01 - Pilot.en.forced.sub")]
         [TestCase("Series Title - S01E01 - Pilot.en.sdh.forced.sub")]
+        [TestCase("Series Title - S01E01 - Pilot.eng.sub")]
         public void should_parse_subtitle_language_english(string fileName)
         {
             var result = LanguageParser.ParseSubtitleLanguage(fileName);
             result.Should().Be(Language.English);
         }
 
+        [TestCase("Spanish Killroy was Here S02E02 Flodden 720p AMZN WEB-DL DDP5 1 H 264-NTb")]
+        [TestCase("Title.the.Spanish.Series.S02E02.1080p.WEB.H264-CAKES")]
+        [TestCase("Title.the.Spanish.Series.S02E06.Field.of.Cloth.of.Gold.1080p.AMZN.WEBRip.DDP5.1.x264-NTb")]
+        [TestCase("Title.the.Series.2009.S01E14.Germany.HDTV.XviD-LOL")]
+        [TestCase("Title.the.Series.2009.S01E14.HDTV.XviD-LOL")]
+        [TestCase("Title.the.Italian.Series.S01E01.The.Family.720p.HDTV.x264-FTP")]
+        [TestCase("Title.the.Italy.Series.S02E01.720p.HDTV.x264-TLA")]
+        [TestCase("Series Title - S01E01 - Pilot.en.sub")]
+        public void should_parse_language_unknown(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().Contain(Language.Unknown);
+        }
+
+        [TestCase("Title.the.Series.2009.S01E14.English.HDTV.XviD-LOL")]
+        [TestCase("Series Title - S01E01 - Pilot.English.sub")]
+        [TestCase("Series Title - S01E01 - Pilot.english.sub")]
+        [TestCase("Series S02 (1999–2003)[BDRemux 1080p AVC Esp DD2.0,Ing DTS-HD5.1,Cat DD2.0 Subs][HD-Olimpo][PACK]")]
+        public void should_parse_language_english(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().Contain(Language.English);
+        }
+
         [TestCase("Title.the.Series.2009.S01E14.French.HDTV.XviD-LOL")]
         [TestCase("Title.the.Series.The.1x13.Tueurs.De.Flics.FR.DVDRip.XviD")]
         [TestCase("Title.S01.720p.VF.WEB-DL.AAC2.0.H.264-BTN")]
@@ -67,7 +67,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_french(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.French.Id);
+            result.Should().Contain(Language.French);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Spanish.HDTV.XviD-LOL")]
@@ -76,7 +76,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_spanish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Spanish.Id);
+            result.Should().Contain(Language.Spanish);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.German.HDTV.XviD-LOL")]
@@ -86,7 +86,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_german(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.German.Id);
+            result.Should().Contain(Language.German);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Italian.HDTV.XviD-LOL")]
@@ -94,28 +94,28 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_italian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Italian.Id);
+            result.Should().Contain(Language.Italian);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Danish.HDTV.XviD-LOL")]
         public void should_parse_language_danish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Danish.Id);
+            result.Should().Contain(Language.Danish);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Dutch.HDTV.XviD-LOL")]
         public void should_parse_language_dutch(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Dutch.Id);
+            result.Should().Contain(Language.Dutch);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Japanese.HDTV.XviD-LOL")]
         public void should_parse_language_japanese(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Japanese.Id);
+            result.Should().Contain(Language.Japanese);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Icelandic.HDTV.XviD-LOL")]
@@ -123,7 +123,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_icelandic(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Icelandic.Id);
+            result.Should().Contain(Language.Icelandic);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Chinese.HDTV.XviD-LOL")]
@@ -142,14 +142,14 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_chinese(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Chinese.Id);
+            result.Should().Contain(Language.Chinese);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Korean.HDTV.XviD-LOL")]
         public void should_parse_language_korean(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Korean.Id);
+            result.Should().Contain(Language.Korean);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Russian.HDTV.XviD-LOL")]
@@ -157,7 +157,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_russian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Russian.Id);
+            result.Should().Contain(Language.Russian);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Polish.HDTV.XviD-LOL")]
@@ -173,63 +173,63 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_polish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Polish.Id);
+            result.Should().Contain(Language.Polish);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Vietnamese.HDTV.XviD-LOL")]
         public void should_parse_language_vietnamese(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Vietnamese.Id);
+            result.Should().Contain(Language.Vietnamese);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Swedish.HDTV.XviD-LOL")]
         public void should_parse_language_swedish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Swedish.Id);
+            result.Should().Contain(Language.Swedish);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Norwegian.HDTV.XviD-LOL")]
         public void should_parse_language_norwegian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Norwegian.Id);
+            result.Should().Contain(Language.Norwegian);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Finnish.HDTV.XviD-LOL")]
         public void should_parse_language_finnish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Finnish.Id);
+            result.Should().Contain(Language.Finnish);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Turkish.HDTV.XviD-LOL")]
         public void should_parse_language_turkish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Turkish.Id);
+            result.Should().Contain(Language.Turkish);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Portuguese.HDTV.XviD-LOL")]
         public void should_parse_language_portuguese(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Portuguese.Id);
+            result.Should().Contain(Language.Portuguese);
         }
 
         [TestCase("Title.the.Series.S01E01.FLEMISH.HDTV.x264-BRiGAND")]
         public void should_parse_language_flemish(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Flemish.Id);
+            result.Should().Contain(Language.Flemish);
         }
 
         [TestCase("Title.the.Series.S03E13.Greek.PDTV.XviD-Ouzo")]
         public void should_parse_language_greek(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Greek.Id);
+            result.Should().Contain(Language.Greek);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.HDTV.XviD.HUNDUB-LOL")]
@@ -238,43 +238,43 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_hungarian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Hungarian.Id);
+            result.Should().Contain(Language.Hungarian);
         }
 
         [TestCase("Title.the.Series.S01-03.DVDRip.HebDub")]
         public void should_parse_language_hebrew(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Hebrew.Id);
+            result.Should().Contain(Language.Hebrew);
         }
 
         [TestCase("Title.the.Series.S05E01.WEBRip.x264.AC3.LT.EN-CNN")]
         public void should_parse_language_lithuanian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Lithuanian.Id);
+            result.Should().Contain(Language.Lithuanian);
         }
 
         [TestCase("Title.the.Series.​S07E11.​WEB Rip.​XviD.​Louige-​CZ.​EN.​5.​1")]
         public void should_parse_language_czech(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Czech.Id);
+            result.Should().Contain(Language.Czech);
         }
 
         [TestCase("Series Title.S01.ARABIC.COMPLETE.720p.NF.WEBRip.x264-PTV")]
         public void should_parse_language_arabic(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Arabic.Id);
+            result.Should().Contain(Language.Arabic);
         }
 
-        [TestCase("The Shadow Series S01 E01-08 WebRip Dual Audio [Hindi 5.1 + English 5.1] 720p x264 AAC ESub")]
+        [TestCase("The Shadow Series S01 E01-08 WebRip Dual Audio [Hindi 5.1] 720p x264 AAC ESub")]
-        [TestCase("The Final Sonarr (2020) S04 Complete 720p NF WEBRip [Hindi+English] Dual audio")]
+        [TestCase("The Final Sonarr (2020) S04 Complete 720p NF WEBRip [Hindi] Dual audio")]
         public void should_parse_language_hindi(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Hindi.Id);
+            result.Should().Contain(Language.Hindi);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Bulgarian.HDTV.XviD-LOL")]
@@ -283,7 +283,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_bulgarian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Bulgarian.Id);
+            result.Should().Contain(Language.Bulgarian);
         }
 
         [TestCase("Series Title S01E01 Malayalam.1080p.WebRip.AVC.5.1-Rjaa")]
@@ -292,7 +292,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_malayalam(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Malayalam.Id);
+            result.Should().Contain(Language.Malayalam);
         }
 
         [TestCase("Гало(Сезон 1, серії 1-5) / SeriesTitle(Season 1, episodes 1-5) (2022) WEBRip-AVC Ukr/Eng")]
@@ -301,7 +301,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_ukrainian(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Ukrainian.Id);
+            result.Should().Contain(Language.Ukrainian);
         }
 
         [TestCase("Title.the.Series.2022.S02E22.Slovak.HDTV.XviD-LOL")]
@@ -309,7 +309,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_slovak(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Slovak.Id);
+            result.Should().Contain(Language.Slovak);
         }
 
         [TestCase("Thai.Series.Title.S01.THAI.1080p.WEBRip.x265-RARBG")]
@@ -318,7 +318,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_thai(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.Thai.Id);
+            result.Should().Contain(Language.Thai);
         }
 
         [TestCase("Title.the.Series.2009.S01E14.Brazilian.HDTV.XviD-LOL")]
@@ -326,7 +326,7 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_portuguese_brazil(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.PortugueseBrazil.Id);
+            result.Should().Contain(Language.PortugueseBrazil);
         }
 
         [TestCase("Series.Title.S01.2019.720p_Eng-Spa(Latino)_MovieClubMx")]
@@ -338,7 +338,52 @@ namespace NzbDrone.Core.Test.ParserTests
         public void should_parse_language_spanish_latino(string postTitle)
         {
             var result = LanguageParser.ParseLanguages(postTitle);
-            result.First().Id.Should().Be(Language.SpanishLatino.Id);
+            result.Should().Contain(Language.SpanishLatino);
+        }
+
+        [TestCase("TV.Series.S01.720p.WEB-DL.RoDubbed-RLSGRP")]
+        [TestCase("TV Series S22E36 ROMANIAN 1080p WEB-DL AAC 2.0 H.264-RLSGRP")]
+        public void should_parse_language_romanian(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().Contain(Language.Romanian);
+        }
+
+        [TestCase("Series S02 (2009–2013)[BDRemux 1080p AVC Cat.DD2.0,Subs][HD-Olimpo][PACK]")]
+        [TestCase("Series S02 (2009–2013)[BDRemux 1080p AVC Esp.DD2.0,Ing.DD2.0,Cat.DD2.0,Subs][HD-Olimpo][PACK]")]
+        [TestCase("Series S02 (1999–2003)[BDRemux 1080p AVC Esp DD2.0,Ing DTS-HD5.1,Cat DD2.0 Subs][HD-Olimpo][PACK]")]
+        [TestCase("Series S01 [WEB-DL NF 1080p EAC3 2.0 esp cat Subs][HDOlimpo]")]
+        [TestCase("Series S02E08 M+ WEBDL 1080p SPA-CAT DD5.1 SUBS x264")]
+        [TestCase("Series Title S02 (2021) [WEB-DL 1080p Castellano DD 5.1 - Catalán DD 5.1 Subs] [HDOlimpo]")]
+        public void should_parse_language_catalan(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().Contain(Language.Catalan);
+        }
+
+        [TestCase("The Shadow Series S01 E01-08 WebRip Dual Audio [Hindi 5.1 + English 5.1] 720p x264 AAC ESub")]
+        [TestCase("The Final Sonarr (2020) S04 Complete 720p NF WEBRip [Hindi+English] Dual audio")]
+        public void should_parse_hindi_and_english(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().BeEquivalentTo(new[] { Language.Hindi, Language.English });
+    }
+
+        [TestCase("Series S01 [WEB-DL NF 1080p EAC3 2.0 esp cat Subs][HDOlimpo]")]
+        [TestCase("Series S02E08 M+ WEBDL 1080p SPA-CAT DD5.1 SUBS x264")]
+        [TestCase("Series Title S02 (2021) [WEB-DL 1080p Castellano DD 5.1 - Catalán DD 5.1 Subs] [HDOlimpo]")]
+        public void should_parse_spanish_and_catalan(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().BeEquivalentTo(new[] { Language.Spanish, Language.Catalan });
+        }
+
+        [TestCase("Series S02 (2009–2013)[BDRemux 1080p AVC Esp.DD2.0,Ing.DD2.0,Cat.DD2.0,Subs][HD-Olimpo][PACK]")]
+        [TestCase("Series S02 (1999–2003)[BDRemux 1080p AVC Esp DD2.0,Ing DTS-HD5.1,Cat DD2.0 Subs][HD-Olimpo][PACK]")]
+        public void should_parse_english_spanish_and_catalan(string postTitle)
+        {
+            var result = LanguageParser.ParseLanguages(postTitle);
+            result.Should().BeEquivalentTo(new[] { Language.English, Language.Spanish, Language.Catalan });
         }
     }
 }

src/NzbDrone.Core/Languages/Language.cs

@@ -105,6 +105,18 @@ namespace NzbDrone.Core.Languages
         public static Language Thai => new Language(32, "Thai");
         public static Language PortugueseBrazil => new Language(33, "Portuguese (Brazil)");
         public static Language SpanishLatino => new Language(34, "Spanish (Latino)");
+        public static Language Romanian => new Language(35, "Romanian");
+        public static Language Latvian => new Language(36, "Latvian");
+        public static Language Persian => new Language(37, "Persian");
+        public static Language Catalan => new Language(38, "Catalan");
+        public static Language Croatian => new Language(39, "Croatian");
+        public static Language Serbian => new Language(40, "Serbian");
+        public static Language Bosnian => new Language(41, "Bosnian");
+        public static Language Estonian => new Language(42, "Estonian");
+        public static Language Tamil => new Language(43, "Tamil");
+        public static Language Indonesian => new Language(44, "Indonesian");
+        public static Language Macedonian => new Language(45, "Macedonian");
+        public static Language Slovenian => new Language(46, "Slovenian");
         public static Language Original => new Language(-2, "Original");
 
         public static List<Language> All
@@ -148,6 +160,16 @@ namespace NzbDrone.Core.Languages
                     Thai,
                     PortugueseBrazil,
                     SpanishLatino,
+                    Romanian,
+                    Latvian,
+                    Persian,
+                    Catalan,
+                    Croatian,
+                    Serbian,
+                    Bosnian,
+                    Estonian,
+                    Tamil,
+                    Indonesian,
                     Original
                 };
             }

src/NzbDrone.Core/Parser/IsoLanguages.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Linq;
-using System.Runtime.InteropServices.ComTypes;
 using NzbDrone.Core.Languages;
 using NzbDrone.Core.Organizer;
 
@@ -44,7 +43,27 @@ namespace NzbDrone.Core.Parser
                                                                new IsoLanguage("sk", "", "slk", Language.Slovak),
                                                                new IsoLanguage("th", "th", "tha", Language.Thai),
                                                                new IsoLanguage("pt", "br", "por", Language.PortugueseBrazil),
-                                                               new IsoLanguage("es", "mx", "spa", Language.SpanishLatino)
+                                                               new IsoLanguage("es", "mx", "spa", Language.SpanishLatino),
+                                                               new IsoLanguage("ro", "", "ron", Language.Romanian),
+                                                               new IsoLanguage("lv", "", "lav", Language.Latvian),
+                                                               new IsoLanguage("fa", "", "fas", Language.Persian),
+                                                               new IsoLanguage("ca", "", "cat", Language.Catalan),
+                                                               new IsoLanguage("hr", "", "hrv", Language.Croatian),
+                                                               new IsoLanguage("sr", "", "srp", Language.Serbian),
+                                                               new IsoLanguage("bs", "", "bos", Language.Bosnian),
+                                                               new IsoLanguage("et", "", "est", Language.Estonian),
+                                                               new IsoLanguage("ta", "", "tam", Language.Tamil),
+                                                               new IsoLanguage("id", "", "ind", Language.Indonesian),
+                                                               new IsoLanguage("mk", "", "mkd", Language.Macedonian),
+                                                               new IsoLanguage("sl", "", "slv", Language.Slovenian),
+                                                           };
+
+        private static readonly Dictionary<string, Language> AlternateIsoCodeMappings = new Dictionary<string, Language>
+        {
+            { "cze", Language.Czech },
+            { "dut", Language.Dutch },
+            { "mac", Language.Macedonian },
+            { "rum", Language.Romanian }
         };
 
         public static IsoLanguage Find(string isoCode)
@@ -76,6 +95,10 @@ namespace NzbDrone.Core.Parser
 
                 return All.FirstOrDefault(l => l.ThreeLetterCode == langCode);
             }
+            else if (AlternateIsoCodeMappings.TryGetValue(isoCode, out var alternateLanguage))
+            {
+                return Get(alternateLanguage);
+            }
 
             return null;
         }

src/NzbDrone.Core/Parser/LanguageParser.cs

@@ -19,7 +19,7 @@ namespace NzbDrone.Core.Parser
                 new RegexReplace(@".*?[_. ](S\d{2}(?:E\d{2,4})*[_. ].*)", "$1", RegexOptions.Compiled | RegexOptions.IgnoreCase)
             };
 
-        private static readonly Regex LanguageRegex = new Regex(@"(?:\W|_)(?<italian>\b(?:ita|italian)\b)|(?<german>german\b|videomann|ger[. ]dub)|(?<flemish>flemish)|(?<greek>greek)|(?<french>(?:\W|_)(?:FR|VF|VF2|VFF|VFQ|TRUEFRENCH)(?:\W|_))|(?<russian>\brus\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)|(?<bulgarian>\bbgaudio\b)|(?<spanish>\b(?:español|castellano)\b)|(?<ukrainian>\b(?:ukr)\b)|(?<thai>\b(?:THAI)\b)",
+        private static readonly Regex LanguageRegex = new Regex(@"(?:\W|_)(?<english>\b(?:ing|eng)\b)|(?<italian>\b(?:ita|italian)\b)|(?<german>german\b|videomann|ger[. ]dub)|(?<flemish>flemish)|(?<greek>greek)|(?<french>(?:\W|_)(?:FR|VF|VF2|VFF|VFQ|TRUEFRENCH)(?:\W|_))|(?<russian>\brus\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)|(?<bulgarian>\bbgaudio\b)|(?<spanish>\b(?:español|castellano|esp|spa(?!\(Latino\)))\b)|(?<ukrainian>\b(?:ukr)\b)|(?<thai>\b(?:THAI)\b)|(?<romainian>\b(?:RoDubbed|ROMANIAN)\b)|(?<catalan>[-,. ]cat[. ](?:DD|subs)|\b(?:catalan|catalán)\b)",
                                                                 RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         private static readonly Regex CaseSensitiveLanguageRegex = new Regex(@"(?:(?i)(?<!SUB[\W|_|^]))(?:(?<lithuanian>\bLT\b)|(?<czech>\bCZ\b)|(?<polish>\bPL\b)|(?<bulgarian>\bBG\b)|(?<slovak>\bSK\b))(?:(?i)(?![\W|_|^]SUB))",
@@ -278,7 +278,14 @@ namespace NzbDrone.Core.Parser
             }
 
             // Case insensitive
-            var match = LanguageRegex.Match(title);
+            var matches = LanguageRegex.Matches(title);
+
+            foreach (Match match in matches)
+            {
+                if (match.Groups["english"].Success)
+                {
+                    languages.Add(Language.English);
+                }
 
                 if (match.Groups["italian"].Captures.Cast<Capture>().Any())
                 {
@@ -355,6 +362,17 @@ namespace NzbDrone.Core.Parser
                     languages.Add(Language.Thai);
                 }
 
+                if (match.Groups["romainian"].Success)
+                {
+                    languages.Add(Language.Romanian);
+                }
+
+                if (match.Groups["catalan"].Success)
+                {
+                    languages.Add(Language.Catalan);
+                }
+            }
+
             return languages;
         }
     }