diff --git a/libse/ContainerFormats/TransportStream/ProgramMapTableParser.cs b/libse/ContainerFormats/TransportStream/ProgramMapTableParser.cs
index 0a3e06c14..4b5b02110 100644
--- a/libse/ContainerFormats/TransportStream/ProgramMapTableParser.cs
+++ b/libse/ContainerFormats/TransportStream/ProgramMapTableParser.cs
@@ -134,9 +134,9 @@ namespace Nikse.SubtitleEdit.Core.ContainerFormats.TransportStream
         {
             var language = GetSubtitleLanguage(packetId);
             var uppercaseLanguage = language.ToUpperInvariant();
-            if (IsoCountryCodes.ThreeToTweLetterLookup.ContainsKey(uppercaseLanguage))
+            if (IsoCountryCodes.ThreeToTwoLetterLookup.ContainsKey(uppercaseLanguage))
             {
-                return IsoCountryCodes.ThreeToTweLetterLookup[uppercaseLanguage].ToLowerInvariant();
+                return IsoCountryCodes.ThreeToTwoLetterLookup[uppercaseLanguage].ToLowerInvariant();
             }
             return language;
         }
diff --git a/libse/IsoCountryCodes.cs b/libse/IsoCountryCodes.cs
index 4d7c7f661..7ac6132f5 100644
--- a/libse/IsoCountryCodes.cs
+++ b/libse/IsoCountryCodes.cs
@@ -5,7 +5,7 @@ namespace Nikse.SubtitleEdit.Core
 {
     public static class IsoCountryCodes
     {
-        public static Dictionary<string, string> ThreeToTweLetterLookup = new Dictionary<string, string>
+        public static Dictionary<string, string> ThreeToTwoLetterLookup = new Dictionary<string, string>
         {
             { "AFG", "AF" },
             { "ALA", "AX" },
@@ -256,7 +256,6 @@ namespace Nikse.SubtitleEdit.Core
             { "ZWE", "ZW" },
         };
 
-
         /// <summary>
         /// Get three letter language code, from two letter language code.
         /// </summary>
@@ -264,13 +263,8 @@ namespace Nikse.SubtitleEdit.Core
         /// <returns>Three letter language code in lowercase, string.Empty if not found</returns>
         public static string GetThreeLetterCodeFromTwoLetterCode(string twoLetterCode)
         {
-            var threeLetters = ThreeToTweLetterLookup.FirstOrDefault(p => p.Value == twoLetterCode.ToUpperInvariant());
-            if (threeLetters.Key?.Length == 3)
-            {
-                return threeLetters.Key.ToLowerInvariant();
-            }
-
-            return string.Empty;
+            var lookupResult = ThreeToTwoLetterLookup.FirstOrDefault(p => p.Value == twoLetterCode.ToUpperInvariant());
+            return lookupResult.Key?.Length == 3 ? lookupResult.Key.ToLowerInvariant() : string.Empty;
         }
     }
 }
diff --git a/src/Forms/BatchConvert.cs b/src/Forms/BatchConvert.cs
index 6b8cf6bf2..e19c8156f 100644
--- a/src/Forms/BatchConvert.cs
+++ b/src/Forms/BatchConvert.cs
@@ -726,7 +726,7 @@ namespace Nikse.SubtitleEdit.Forms
             }
 
             if (Configuration.Settings.Tools.BatchConvertMkvLanguageCodeStyle == "2" &&
-                IsoCountryCodes.ThreeToTweLetterLookup.TryGetValue(languageCode.ToUpperInvariant(), out var twoLetterCode))
+                IsoCountryCodes.ThreeToTwoLetterLookup.TryGetValue(languageCode.ToUpperInvariant(), out var twoLetterCode))
             {
                 return twoLetterCode.ToLowerInvariant() + ".";
             }
diff --git a/src/Logic/Ocr/OcrFixEngine.cs b/src/Logic/Ocr/OcrFixEngine.cs
index 38cc39aff..a045847a9 100644
--- a/src/Logic/Ocr/OcrFixEngine.cs
+++ b/src/Logic/Ocr/OcrFixEngine.cs
@@ -173,7 +173,7 @@ namespace Nikse.SubtitleEdit.Logic.Ocr
             foreach (var culture in CultureInfo.GetCultures(CultureTypes.NeutralCultures))
             {
                 var twoLetterCode = "?";
-                if (threeLetterIsoLanguageName != null && IsoCountryCodes.ThreeToTweLetterLookup.TryGetValue(threeLetterIsoLanguageName, out twoLetterCode))
+                if (threeLetterIsoLanguageName != null && IsoCountryCodes.ThreeToTwoLetterLookup.TryGetValue(threeLetterIsoLanguageName, out twoLetterCode))
                 {
                     twoLetterCode = twoLetterCode.ToLowerInvariant();
                 }