I'm trying to display the user's language settings field on the registration page, but no success so far.
I've tried using a template (form--user-register-form.html.twig). This works for other fields, like mail, name, but I don't know how to access the language setting field.
I also tried form_alter (both in the theme and module MODULE_user_register_form_alter), and set
$form['language']['#access'] = true; This hook doesn't seem to work at all, nothing happens when I try to use it (print out variables for example).