Localized string "register" break modul function "register for event"

In a localized installation break the translated string "register" from the signup module the event manager modul function "register for event".

Example:
I translate the string "register" from the signup module to "Registrieren".

In the event manager module exist the function event_manager_registration_form_submit().
In this function exist

$is_registration = ($op == 'registration');

That is the point.
With translated string "register" from the signup module the $_POST['registration'] not exist! Now i have $_POST['Registrieren'].