diff --git a/Modules/GenHTTP.Modules.I18n/Parsers/CultureInfoParser.cs b/Modules/GenHTTP.Modules.I18n/Parsers/CultureInfoParser.cs
index 7a620110..9e5460ad 100644
--- a/Modules/GenHTTP.Modules.I18n/Parsers/CultureInfoParser.cs
+++ b/Modules/GenHTTP.Modules.I18n/Parsers/CultureInfoParser.cs
@@ -116,8 +116,12 @@ public static CultureInfo[] ParseFromLanguage(string? language)
                 }
 
                 try
-                {
-                    results.Add(CultureInfo.CreateSpecificCulture(lang));
+                { 
+                    var parsed = CultureInfo.CreateSpecificCulture(lang);
+                    if (parsed.LCID != CultureInfo.InvariantCulture.LCID)
+                    {
+                        results.Add(parsed);
+                    }
                 }
                 catch (CultureNotFoundException)
                 {
diff --git a/Testing/Acceptance/Modules/I18n/LanguageParserTests.cs b/Testing/Acceptance/Modules/I18n/LanguageParserTests.cs
index 43069ef6..d22c1dec 100644
--- a/Testing/Acceptance/Modules/I18n/LanguageParserTests.cs
+++ b/Testing/Acceptance/Modules/I18n/LanguageParserTests.cs
@@ -58,6 +58,7 @@ public sealed class LanguageParserTests
         new ("en ;q=0.9,fr;q=0.8,de", [Culture("de"), Culture("en"), Culture("fr")]),
         new ("en; q=0.9 ,  fr; q=  0.8,  de", [Culture("de"), Culture("en"), Culture("fr")]),
         new ("en-UK;q=0.9,fr;q=0.8,de", [Culture("de"), Culture("en-uk"), Culture("fr")]),
+        new ("en-UK;q=0.9,ww;q=0.8,de", [Culture("de"), Culture("en-uk")]),
     ];
 
     [TestMethod]