diff --git a/boot.php b/boot.php
index 122770d..ff9599d 100644
--- a/boot.php
+++ b/boot.php
@@ -8,6 +8,10 @@
     'rex_qanda_category',
     qanda_category::class,
 );
+rex_yform_manager_dataset::setModelClass(
+    'rex_qanda_lang',
+    qanda_lang::class,
+);
 
 if (rex::isBackend() && 'qanda/qanda' == rex_be_controller::getCurrentPage()) {