iss1162 oddly enough yet another place where the active language was …

…not present.

question.php

@@ -605,6 +605,12 @@ public function get_generalfeedback_castext() {
 
         // Init a session with question-variables and the related details.
         $session = new stack_cas_session2([], $this->options, $this->seed);
+        if (count($this->get_cached('langs')) > 0) {
+            $ml = new stack_multilang();
+            $selected = $ml->pick_lang($this->get_cached('langs'));
+            $session->add_statement(new stack_secure_loader('%_STACK_LANG:' .
+                stack_utils::php_string_to_maxima_string($selected), 'language setting'), false);
+        }
         if ($this->get_cached('preamble-qv') !== null) {
             $session->add_statement(new stack_secure_loader($this->get_cached('preamble-qv'), 'preamble'));
         }
@@ -652,6 +658,12 @@ public function get_questiondescription_castext() {
 
         // Init a session with question-variables and the related details.
         $session = new stack_cas_session2([], $this->options, $this->seed);
+        if (count($this->get_cached('langs')) > 0) {
+            $ml = new stack_multilang();
+            $selected = $ml->pick_lang($this->get_cached('langs'));
+            $session->add_statement(new stack_secure_loader('%_STACK_LANG:' .
+                stack_utils::php_string_to_maxima_string($selected), 'language setting'), false);
+        }
         if ($this->get_cached('preamble-qv') !== null) {
             $session->add_statement(new stack_secure_loader($this->get_cached('preamble-qv'), 'preamble'));
         }