Update README.md

Added locale information

Author: aszk

instructions/README.md

@@ -2,7 +2,7 @@
 
 
 ## skill-sample-python-smarthome-switch
-These instructions are to build a Sample Alexa Smart Home skill using Python that creates and controls a virtual sample switch that responds to ON/OFF commands.
+These instructions are to build a Sample Alexa Smart Home skill(en-US) using Python that creates and controls a virtual sample switch that responds to ON/OFF commands.
 
 ## Setup the Alexa Smart Home Sample via the Alexa Developer Console