+// TODO: translate the following.
+// 'error.xml' => 'Error in XML file at line %d: %s.',
+// 'error.cannot_import' => 'Cannot import: %s.',
+// 'error.format' => 'Invalid file format.',
+// 'error.user_count' => 'Limit on user count.',
+// 'error.expired' => 'Expiration date reached.',
+
+// Warning messages.
+// TODO: translate the following.
+// 'warn.sure' => 'Are you sure?',
+// 'warn.confirm_save' => 'Date has changed. Confirm saving, not copying this item.',
+
+// Success messages.
+// TODO: translate the following.
+// 'msg.success' => 'Operation completed successfully.',