diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index ff014031df3..d1fe12f5fcc 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4961,6 +4961,11 @@ abstract class CommonObject
 		// phpcs:enable
 		global $langs,$conf;
 
+		if (! is_object($langs)) {	// If lang was not defined, we set it. It is required by run_triggers.
+			include_once DOL_DOCUMENT_ROOT.'/core/class/translate.class.php';
+			$langs = new Translate('', $conf);
+		}
+
 		include_once DOL_DOCUMENT_ROOT . '/core/class/interfaces.class.php';
 		$interface=new Interfaces($this->db);
 		$result=$interface->run_triggers($trigger_name, $this, $user, $langs, $conf);