diff --git a/guacamole-common-js/src/main/webapp/modules/Client.js b/guacamole-common-js/src/main/webapp/modules/Client.js
index d30075d4f..2281930e0 100644
--- a/guacamole-common-js/src/main/webapp/modules/Client.js
+++ b/guacamole-common-js/src/main/webapp/modules/Client.js
@@ -689,13 +689,17 @@ Guacamole.Client = function(tunnel) {
     this.onerror = null;
     
     /**
-     * Fired when a message is received from the remote tunnel and needs to be
-     * displayed to the user.
+     * Fired when an arbitrary message is received from the tunnel that should
+     * be processed by the client.
      * 
      * @event
-     * @param {String} message
-     *     The message sent by the remote end of the tunnel that should be
-     *     displayed for the user.
+     * @param {!number} msgcode
+     *     A status code sent by the remote server that indicates the nature of
+     *     the message that is being sent to the client.
+     *     
+     * @param {string[]} args
+     *     An array of arguments to be processed with the message sent to the
+     *     client.
      */
     this.onmsg = null;
 
@@ -1413,7 +1417,7 @@ Guacamole.Client = function(tunnel) {
         
         "msg" : function(parameters) {
             
-            if (guac_client.onmsg) guac_client.onmsg(parameters[0]);
+            if (guac_client.onmsg) guac_client.onmsg(parseInt(parameters[0]), parameters.slice(1));
             
         },
 
@@ -1841,3 +1845,31 @@ Guacamole.Client.DefaultTransferFunction = {
     }
 
 };
+
+/**
+ * A list of possible messages that can be sent by the server for processing
+ * by the client.
+ * 
+ * @type {!Object.<string, number>}
+ */
+Guacamole.Client.Message = {
+    
+    /**
+     * A client message that indicates that a user has joined an existing
+     * connection. This message xpects a single additional argument - the
+     * username of the user who has joined the connection.
+     * 
+     * @type {!number}
+     */
+    "USER_JOINED": 0x0001,
+    
+    /**
+     * A client message that indicates that a user has left an existing
+     * connection. This message expects a single additional argument - the
+     * username of the user who has left the connection.
+     * 
+     * @type {!number}
+     */
+    "USER_LEFT": 0x0002
+    
+};
diff --git a/guacamole-common/src/main/java/org/apache/guacamole/protocol/GuacamoleProtocolVersion.java b/guacamole-common/src/main/java/org/apache/guacamole/protocol/GuacamoleProtocolVersion.java
index a8e443102..3da4fac4b 100644
--- a/guacamole-common/src/main/java/org/apache/guacamole/protocol/GuacamoleProtocolVersion.java
+++ b/guacamole-common/src/main/java/org/apache/guacamole/protocol/GuacamoleProtocolVersion.java
@@ -56,8 +56,8 @@ public class GuacamoleProtocolVersion {
     /**
      * Protocol version 1.5.0, which introduces the "msg" instruction, allowing
      * the server to send message notifications that will be displayed on the
-     * client. The version also adds support for the "name" handshake
-     * instruction, allowing guacd to store the name of the user who is
+     * client. The version also adds support for the "username" handshake
+     * instruction, allowing guacd to store the username of the user who is
      * accessing the connection.
      */
     public static final GuacamoleProtocolVersion VERSION_1_5_0 = new GuacamoleProtocolVersion(1, 5, 0);
diff --git a/guacamole/src/main/frontend/src/app/client/directives/guacClientMessage.js b/guacamole/src/main/frontend/src/app/client/directives/guacClientMessage.js
index 9e63edb18..bf937d20a 100644
--- a/guacamole/src/main/frontend/src/app/client/directives/guacClientMessage.js
+++ b/guacamole/src/main/frontend/src/app/client/directives/guacClientMessage.js
@@ -28,15 +28,54 @@ angular.module('client').directive('guacClientMessage', [function guacClientMess
         scope: {
 
             /**
-             * The message to display.
+             * The message to display to the client.
              * 
-             * @type String
+             * @type {!ManagedClientMessage}
              */
             message : '='
 
         },
 
-        templateUrl: 'app/client/templates/guacClientMessage.html'
+        templateUrl: 'app/client/templates/guacClientMessage.html',
+        
+        controller: ['$scope', '$injector', '$element',
+                function guacClientMessageController($scope, $injector, $element) {
+            
+            const ManagedClientMessage = $injector.get('ManagedClientMessage');
+            
+            /**
+             * Uses the msgcode to retrieve the correct translation key for
+             * the client message.
+             * 
+             * @returns {string}
+             */
+            $scope.getMessageKey = function getMessageKey() {
+                
+                let msgString = "DEFAULT";
+                if (Object.values(Guacamole.Client.Message).includes($scope.message.msgcode))
+                    msgString = Object.keys(Guacamole.Client.Message).find(key => Guacamole.Client.Message[key] === $scope.message.msgcode);
+                
+                return "CLIENT.CLIENT_MESSAGE_" + msgString.toUpperCase();
+            };
+            
+            /**
+             * Returns a set of key/value object pairs that represent the
+             * arguments provided as part of the message in the form
+             * ARGS[0] = value.
+             * 
+             * @returns {Object}
+             */
+            $scope.getMessageArgs = function getMessageArgs() {
+                return $scope.message.args.reduce(
+                    function(acc, value, index) {
+                        acc[`ARGS[${index}]`] = value;
+                        return acc;
+                    },
+                    {}
+                );
+            };
+                
+        }]
 
     };
 }]);
diff --git a/guacamole/src/main/frontend/src/app/client/templates/guacClientMessage.html b/guacamole/src/main/frontend/src/app/client/templates/guacClientMessage.html
index 95b06e7ee..472d02fef 100644
--- a/guacamole/src/main/frontend/src/app/client/templates/guacClientMessage.html
+++ b/guacamole/src/main/frontend/src/app/client/templates/guacClientMessage.html
@@ -1,6 +1,8 @@
 <div class="client-message" ng-click="clear()">
 
     <!-- Message text -->
-    <p class="client-message-text">{{ message }}</p>
+    <p class="client-message-text"
+       translate="{{ getMessageKey() }}"
+       translate-values="{{ getMessageArgs() }}"></p>
 
 </div>
diff --git a/guacamole/src/main/frontend/src/app/client/types/ManagedClient.js b/guacamole/src/main/frontend/src/app/client/types/ManagedClient.js
index 6c8c6a1f1..18c0ceba0 100644
--- a/guacamole/src/main/frontend/src/app/client/types/ManagedClient.js
+++ b/guacamole/src/main/frontend/src/app/client/types/ManagedClient.js
@@ -28,6 +28,7 @@ angular.module('client').factory('ManagedClient', ['$rootScope', '$injector',
     const ClientIdentifier       = $injector.get('ClientIdentifier');
     const ClipboardData          = $injector.get('ClipboardData');
     const ManagedArgument        = $injector.get('ManagedArgument');
+    const ManagedClientMessage   = $injector.get('ManagedClientMessage');
     const ManagedClientState     = $injector.get('ManagedClientState');
     const ManagedClientThumbnail = $injector.get('ManagedClientThumbnail');
     const ManagedDisplay         = $injector.get('ManagedDisplay');
@@ -178,7 +179,7 @@ angular.module('client').factory('ManagedClient', ['$rootScope', '$injector',
          * All messages that have been sent to the client that should be
          * displayed.
          * 
-         * @type String[]
+         * @type ManagedClientMessage[]
          */
         this.messages = template.messages || [];
 
@@ -496,10 +497,14 @@ angular.module('client').factory('ManagedClient', ['$rootScope', '$injector',
         };
         
         // Handle messages received from guacd to display to the client.
-        client.onmsg = function clientMessage(message) {
+        client.onmsg = function clientMessage(msgcode, args) {
+            
+            msg = new ManagedClientMessage();
+            msg.msgcode = msgcode;
+            msg.args = args;
             
             $rootScope.$apply(function updateMessages() {
-                managedClient.messages.push(message);
+                managedClient.messages.push(msg);
             });
             
         };
diff --git a/guacamole/src/main/frontend/src/app/client/types/ManagedClientMessage.js b/guacamole/src/main/frontend/src/app/client/types/ManagedClientMessage.js
new file mode 100644
index 000000000..9a7c2e18a
--- /dev/null
+++ b/guacamole/src/main/frontend/src/app/client/types/ManagedClientMessage.js
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+/**
+ * Provides the ManagedClientMessage class used for messages displayed in
+ * a ManagedClient.
+ */
+angular.module('client').factory('ManagedClientMessage', [function defineManagedClientMessage() {
+
+    /**
+     * Object which represents a message to be displayed to a Guacamole client.
+     *
+     * @constructor
+     * @param {ManagedClientMessage|Object} [template={}]
+     *     The object whose properties should be copied within the new
+     *     ManagedClientMessage.
+     */
+    var ManagedClientMessage = function ManagedClientMessage(template) {
+
+        // Use empty object by default
+        template = template || {};
+
+        /**
+         * The message code sent by the server that will be used to locate the
+         * message within the Guacamole translation framework.
+         */
+        this.msgcode = template.msgcode;
+        
+        /**
+         * Any arguments that should be passed through the translation system
+         * and displayed as part of the message.
+         */
+        this.args = template.args;
+        
+    };
+
+    return ManagedClientMessage;
+
+}]);
\ No newline at end of file
diff --git a/guacamole/src/main/frontend/src/translations/en.json b/guacamole/src/main/frontend/src/translations/en.json
index 3b5bf4291..c19fed13d 100644
--- a/guacamole/src/main/frontend/src/translations/en.json
+++ b/guacamole/src/main/frontend/src/translations/en.json
@@ -72,6 +72,10 @@
         "ACTION_SHARE"                     : "@:APP.ACTION_SHARE",
         "ACTION_UPLOAD_FILES"              : "Upload Files",
 
+        "CLIENT_MESSAGE_DEFAULT" : "",
+        "CLIENT_MESSAGE_JOINED"  : "User {ARGS[0]} has joined the connection.",
+        "CLIENT_MESSAGE_LEFT"    : "User {ARGS[0]} has left the connection.",
+        
         "DIALOG_HEADER_CONNECTING"       : "Connecting",
         "DIALOG_HEADER_CONNECTION_ERROR" : "Connection Error",
         "DIALOG_HEADER_DISCONNECTED"     : "Disconnected",