IsEnglishLocal checks CurrentCulture and CurrentUICulture

Since some skipped tests require en culture and others require en UI culture,
this ensures both groups are skipped when at least one of them is not en.

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

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
 using System;
+using System.Globalization;
 using System.Text;
 using Xunit;
 
@@ -45,9 +46,10 @@ public class HasShiftJisDefaultEncoding : ExecutionCondition
     public class IsEnglishLocal : ExecutionCondition
     {
         public override bool ShouldSkip =>
-            !System.Globalization.CultureInfo.CurrentUICulture.Name.StartsWith("en", StringComparison.OrdinalIgnoreCase);
+            !CultureInfo.CurrentUICulture.Name.StartsWith("en", StringComparison.OrdinalIgnoreCase) ||
+            !CultureInfo.CurrentCulture.Name.StartsWith("en", StringComparison.OrdinalIgnoreCase);
 
-        public override string SkipReason => "Current culture is not en-US";
+        public override string SkipReason => "Current culture is not en";
     }
 
     public class IsRelease : ExecutionCondition