How to modify this statement to get a url to pt_BR?

Question

I’m working on the theme Academy made by the gringos and I would like to know how to modify this instruction to be able to replace register for cadastrar and thus get a url in pt_BR.

'register' => array(
    'title' => __('Registration', 'academy'),
    'name' => 'register',
    'rule' => 'register/?',
    'rewrite' => 'index.php?register=1',
    'position' => 'top',
    'authorized' => false,
), ...

Will I have to modify only at this point or in other points of the theme, the call may not work?