diff --git a/front/php/templates/language/en_us.json b/front/php/templates/language/en_us.json
index 02fa6a6c..db43a6f0 100755
--- a/front/php/templates/language/en_us.json
+++ b/front/php/templates/language/en_us.json
@@ -138,6 +138,9 @@
         "DevDetail_Shortcut_DownAlerts" : "Down Alerts",
         "DevDetail_Tab_Details" : "<i class=\"fa fa-info-circle\"></i> Details",
 	"DevDetail_Tab_Tools": "<i class=\"fa fa-screwdriver-wrench\"></i> Tools",
+	"DevDetail_Tab_Tools_Nslookup_Title": "Nslookup",
+	"DevDetail_Tab_Tools_Nslookup_Start": "Start Nslookup",
+	"DevDetail_Tab_Tools_Nslookup_Error": "Error: IP address is not valid",
 	"DevDetail_Tab_Tools_Ping_Title": "Ping",
 	"DevDetail_Tab_Tools_Ping_Start": "Start Ping",
 	"DevDetail_Tab_Tools_Ping_Error": "Error: IP address is not valid",