diff --git a/Tools/ArdupilotMegaPlanner/ArduinoDetect.cs b/Tools/ArdupilotMegaPlanner/ArduinoDetect.cs
index bbd132643b..15805cf2b2 100644
--- a/Tools/ArdupilotMegaPlanner/ArduinoDetect.cs
+++ b/Tools/ArdupilotMegaPlanner/ArduinoDetect.cs
@@ -158,7 +158,7 @@ namespace ArdupilotMega
                     {
                         serialPort.Close();
                         //HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB\VID_2341&PID_0010\640333439373519060F0\Device Parameters
-                        if (!MainV2.MONO || Thread.CurrentThread.CurrentUICulture.Name != "zh-Hans")
+                        if (!MainV2.MONO && !Thread.CurrentThread.CurrentUICulture.IsChildOf(CultureInfoEx.GetCultureInfo("zh-Hans")))
                         {
                             ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_USBControllerDevice");
                             ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);