Hi!
codegen does not create a translated selection lists hint (- Select One -) in forms_generated. Could you please change the file includes/qcodo/codegen/subtemplates/control_create_reference.tpl (and control_create_type.tpl):
$this->lstSOMELISTObject->AddItem('- Select One -', null);
to
$this->lstSOMELISTObject->AddItem(QApplication::Translate('- Select One -'), null);
Regards,
Andreas