Add strings.

en.json

@@ -80,7 +80,8 @@
             },
             "pages": {
                 "account": {
-                    "title": "My Account"
+                    "title": "My Account",
+                    "change_field": "Change"
                 },
                 "sessions": {
                     "title": "Sessions",
@@ -137,9 +138,19 @@
                     "confirm_leave": "Leave {{group_name}}?",
                     "confirm_leave_long": "You won't be able to rejoin unless you are re-invited."
                 },
+                "account": {
+                    "change": {
+                        "username": "Change your username",
+                        "email": "Change your email",
+                        "password": "Change your password"
+                    },
+                    "current_password": "Current Password",
+                    "enter_current": "Enter your current password."
+                },
                 "actions": {
                     "ok": "Ok",
                     "close": "Close",
+                    "update": "Update",
                     "reload": "Reload App",
                     "continue": "Continue",
                     "cancel": "Cancel"