Add strings.

en.json

@@ -118,7 +118,14 @@
                     "title": "Notifications",
                     "enable_desktop": "Enable Desktop Notifications.",
                     "enable_push": "Enable Push Notifications.",
-                    "enable_sound": "Play Sound on Message."
+                    "enable_sound": "Play Sound on Message.",
+                    "enable_outgoing_sound": "Play Send Sound.",
+                    "descriptions": {
+                        "enable_desktop": "This will give you notifications while your app is open.",
+                        "enable_push": "Enable to receive notifications when you're offline.",
+                        "enable_sound": "Enable for incoming message sounds.",
+                        "enable_outgoing_sound": "Enable to play sound when you send a message."
+                    }
                 },
                 "language": {
                     "title": "Language"