Merge pull request #9860 from TyOverby/working-culture-checker

Fix culture conditional fact attribute

src/Test/Utilities/Shared/Assert/ConditionalFactAttribute.cs

@@ -45,7 +45,7 @@ public class HasShiftJisDefaultEncoding : ExecutionCondition
     public class IsEnglishLocal : ExecutionCondition
     {
         public override bool ShouldSkip =>
-                System.Globalization.CultureInfo.CurrentCulture != new System.Globalization.CultureInfo("en-US");
+            !System.Globalization.CultureInfo.CurrentUICulture.Name.StartsWith("en", StringComparison.OrdinalIgnoreCase);
 
         public override string SkipReason => "Current culture is not en-US";
     }