Cleanup variants dirty tracking

src/Umbraco.Web/Models/Mapping/ContentMapperProfile.cs

@@ -132,7 +132,7 @@ namespace Umbraco.Web.Models.Mapping
 
                 // if we don't have a name for a culture, it means the culture is not available, and
                 // hey we should probably not be mapping it, but it's too late, return a fallback name
-                return source.CultureNames.TryGetValue(culture, out var name) && !name.Name.IsNullOrWhiteSpace() ? name.Name : $"(({source.Name}))";
+                return source.CultureInfos.TryGetValue(culture, out var name) && !name.Name.IsNullOrWhiteSpace() ? name.Name : $"(({source.Name}))";
             }
         }
     }