diff --git a/guacamole/src/main/frontend/src/app/import/directives/connectionImportErrors.js b/guacamole/src/main/frontend/src/app/import/directives/connectionImportErrors.js
index 65b4403fe..aae51db63 100644
--- a/guacamole/src/main/frontend/src/app/import/directives/connectionImportErrors.js
+++ b/guacamole/src/main/frontend/src/app/import/directives/connectionImportErrors.js
@@ -155,6 +155,10 @@ angular.module('import').directive('connectionImportErrors', [
             if (!patchFailure || !parseResult)
                 return;
 
+            // All promises from all translation requests. The scope will not be
+            // updated until all translations are ready.
+            const translationPromises = [];
+
             // Set up the list of connection errors based on the existing parse
             // result, with error messages fetched from the patch failure
             $scope.connectionErrors = parseResult.patches.map(
@@ -166,10 +170,24 @@ angular.module('import').directive('connectionImportErrors', [
                 // Set the error from the PATCH request, if there is one
                 const error = _.get(patchFailure, ['patches', index, 'error']);
                 if (error)
-                    connectionError.errors = new DisplayErrorList([error]);
+
+                    // Fetch the translation and update it when it's ready
+                    translationPromises.push($translate(
+                        error.key, error.variables)
+                        .then(translatedError =>
+                            connectionError.errors.getArray().push(translatedError)
+                        ));
 
                 return connectionError;
+                
             });
+
+            // Once all the translations have been completed, update the
+            // connectionErrors all in one go, to ensure no excessive reloading
+            $q.all(translationPromises).then(() => {
+                $scope.connectionErrors = connectionErrors;
+            });
+            
         });
 
         // If a new parse result with errors is seen, update the display list
diff --git a/guacamole/src/main/frontend/src/app/import/types/ParseError.js b/guacamole/src/main/frontend/src/app/import/types/ParseError.js
index 33fd07765..b4b3dd647 100644
--- a/guacamole/src/main/frontend/src/app/import/types/ParseError.js
+++ b/guacamole/src/main/frontend/src/app/import/types/ParseError.js
@@ -61,6 +61,13 @@ angular.module('import').factory('ParseError', [function defineParseError() {
          */
         this.variables = template.variables;
 
+        // If no translation key is available, fall back to the untranslated
+        // key, passing the raw message directly through the translation system
+        if (!this.key) {
+            this.key = 'APP.TEXT_UNTRANSLATED';
+            this.variables = { MESSAGE: this.message };
+        }
+
     };
 
     return ParseError;
diff --git a/guacamole/src/main/frontend/src/app/rest/types/DirectoryPatchOutcome.js b/guacamole/src/main/frontend/src/app/rest/types/DirectoryPatchOutcome.js
index e6710c2ca..324f1ae18 100644
--- a/guacamole/src/main/frontend/src/app/rest/types/DirectoryPatchOutcome.js
+++ b/guacamole/src/main/frontend/src/app/rest/types/DirectoryPatchOutcome.js
@@ -68,7 +68,7 @@ angular.module('rest').factory('DirectoryPatchOutcome', [
          * The error message associated with the failure, if the patch failed to
          * apply.
          *
-         * @type {String}
+         * @type {TranslatableMessage}
          */
         this.error = template.error;
 
diff --git a/guacamole/src/main/java/org/apache/guacamole/rest/directory/DirectoryResource.java b/guacamole/src/main/java/org/apache/guacamole/rest/directory/DirectoryResource.java
index 0cfa8cb0f..0230051a9 100644
--- a/guacamole/src/main/java/org/apache/guacamole/rest/directory/DirectoryResource.java
+++ b/guacamole/src/main/java/org/apache/guacamole/rest/directory/DirectoryResource.java
@@ -21,10 +21,13 @@ package org.apache.guacamole.rest.directory;
 
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.GET;
@@ -39,6 +42,8 @@ import org.apache.guacamole.GuacamoleClientException;
 import org.apache.guacamole.GuacamoleException;
 import org.apache.guacamole.GuacamoleResourceNotFoundException;
 import org.apache.guacamole.GuacamoleUnsupportedException;
+import org.apache.guacamole.language.Translatable;
+import org.apache.guacamole.language.TranslatableMessage;
 import org.apache.guacamole.net.auth.AtomicDirectoryOperation;
 import org.apache.guacamole.net.auth.AuthenticatedUser;
 import org.apache.guacamole.net.auth.AuthenticationProvider;
@@ -53,6 +58,7 @@ import org.apache.guacamole.net.auth.permission.SystemPermissionSet;
 import org.apache.guacamole.net.event.DirectoryEvent;
 import org.apache.guacamole.net.event.DirectoryFailureEvent;
 import org.apache.guacamole.net.event.DirectorySuccessEvent;
+import org.apache.guacamole.rest.APIError;
 import org.apache.guacamole.rest.event.ListenerService;
 import org.apache.guacamole.rest.jsonpatch.APIPatch;
 import org.apache.guacamole.rest.jsonpatch.APIPatchError;
@@ -415,6 +421,61 @@ public abstract class DirectoryResource<InternalType extends Identifiable, Exter
 
     }
 
+    /**
+     * If the provided throwable is a known Guacamole-specific type, create and
+     * return a APIPatchError with an error message extracted from the error.
+     * If the provided throwable is not a known type, null will be returned.
+     *
+     * @param op
+     *     The operation being attempted when the error occurred.
+     *
+     * @param identifier
+     *     The identifier of the object in question, if any.
+     *
+     * @param path
+     *     The path for the patch that was being applied when the error occurred.
+     *
+     * @param t
+     *     The error that occurred while attempting to apply the patch.
+     *
+     * @return
+     *     A APIPatchError with an error message extracted from the provided
+     *     throwable - if it's a known type, otherwise null.
+     */
+    @Nullable
+    private APIPatchError createPatchFailure(
+            @Nonnull APIPatch.Operation op, @Nullable String identifier,
+            @Nonnull String path, @Nonnull Throwable t) {
+
+        /*
+         * If the failure is a translatable type, use the translation directly
+         * in the patch error.
+         */
+        if (t instanceof Translatable)
+            return new APIPatchError(
+                op, identifier, path,
+                ((Translatable) t).getTranslatableMessage());
+
+        /*
+         * If the failure represents a known Guacamole exception but is not
+         * translateable, create a patch error containing the raw untranslated
+         * exception message.
+         */
+        if (t instanceof GuacamoleException) {
+
+            // Create a translated message that will fall
+            // through to the untranslated message
+            TranslatableMessage message = new TranslatableMessage(
+                    "APP.TEXT_UNTRANSLATED", Collections.singletonMap(
+                            "MESSAGE", ((GuacamoleException) t).getMessage()));
+
+            return new APIPatchError(op, identifier, path, message);
+        }
+
+        // The error is not a known type - no patch error can be generated
+        return null;
+    }
+
     /**
      * Applies the given object patches, updating the underlying directory
      * accordingly. This operation supports addition and removal of objects
@@ -512,19 +573,19 @@ public abstract class DirectoryResource<InternalType extends Identifiable, Exter
                                     DirectoryEvent.Operation.ADD,
                                     internal.getIdentifier(), internal, e);
 
-                            /*
-                             * If the failure represents an understood issue,
-                             * create a failure outcome for this failed patch.
-                             */
-                            if (e instanceof GuacamoleException)
-                                patchOutcomes.add(new APIPatchError(
-                                        op, null, path,
-                                        ((GuacamoleException) e).getMessage()));
+                            // Attempt to generate an API Patch error using the
+                            // caught exception
+                            APIPatchError patchError = createPatchFailure(
+                                    op, null, path, e);
 
-                            // If an unexpected failure occurs, fall through to the
-                            // standard API error handling
+                            if (patchError != null)
+                                patchOutcomes.add(patchError);
+
+                            // If an unexpected failure occurs, fall through to
+                            // the standard API error handling
                             else
                                 throw e;
+
                         }
 
                     }
@@ -554,17 +615,16 @@ public abstract class DirectoryResource<InternalType extends Identifiable, Exter
                                     DirectoryEvent.Operation.REMOVE,
                                     identifier, null, e);
 
-                            /*
-                             * If the failure represents an understood issue,
-                             * create a failure outcome for this failed patch.
-                             */
-                            if (e instanceof GuacamoleException)
-                                patchOutcomes.add(new APIPatchError(
-                                        op, identifier, path,
-                                        ((GuacamoleException) e).getMessage()));
+                            // Attempt to generate an API Patch error using the
+                            // caught exception
+                            APIPatchError patchError = createPatchFailure(
+                                    op, identifier, path, e);
 
-                            // If an unexpected failure occurs, fall through to the
-                            // standard API error handling
+                            if (patchError != null)
+                                patchOutcomes.add(patchError);
+
+                            // If an unexpected failure occurs, fall through to
+                            // the standard API error handling
                             else
                                 throw e;
                         }
diff --git a/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchError.java b/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchError.java
index 85d28a714..45dcd5be4 100644
--- a/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchError.java
+++ b/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchError.java
@@ -19,6 +19,7 @@
 
 package org.apache.guacamole.rest.jsonpatch;
 
+import org.apache.guacamole.language.TranslatableMessage;
 import org.apache.guacamole.rest.jsonpatch.APIPatch.Operation;
 
 /**
@@ -33,7 +34,7 @@ public class APIPatchError extends APIPatchOutcome {
     /**
      * The error associated with the submitted patch.
      */
-    private final String error;
+    private final TranslatableMessage error;
 
     /**
      * Create a failure status associated with a submitted patch from a JSON
@@ -54,7 +55,8 @@ public class APIPatchError extends APIPatchOutcome {
      *     patch from applying.
      */
     public APIPatchError(
-            Operation op, String identifier, String path, String error) {
+            Operation op, String identifier, String path,
+            TranslatableMessage error) {
         super(op, identifier, path);
         this.error = error;
     }
@@ -65,7 +67,7 @@ public class APIPatchError extends APIPatchOutcome {
      * @return
      *     The error associated with the patch failure.
      */
-    public String getError() {
+    public TranslatableMessage getError() {
         return error;
     }
 }
diff --git a/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchFailureException.java b/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchFailureException.java
index fa40bffc6..e77be6d46 100644
--- a/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchFailureException.java
+++ b/guacamole/src/main/java/org/apache/guacamole/rest/jsonpatch/APIPatchFailureException.java
@@ -51,7 +51,7 @@ public class APIPatchFailureException extends GuacamoleClientException {
     public APIPatchFailureException(
             String message, List<APIPatchOutcome> patches) {
 
-        super(message );
+        super(message);
         this.patches = patches;
     }