In CMS: http://ipoli-mpo.php7.burdadigital.pl/app_dev.php/admin/app/form-choicelist/2/edit
You can see: "Action" or "Send"
I created a form with above: http://ipoli-mpo.php7.burdadigital.pl/app_dev.php/admin/app/form-form/17/formelement/list?childId=17
And when I add this form in THIS article.
You can see that this is translated into polish "Akcja" and "Wyślij".
What must be done: words added in the selection list should not be translated.