Wordpress: Change CPT values from child theme

cpt-field-change-from-child-theme-1.php

<?php
add_action('registered_post_type', 'custom_registered_post_type_handler', 10, 2);
function custom_registered_post_type_handler($post_type, $args) {
  do_action("custom_registered_{$post_type}_post_type", $post_type, $args);
}

add_action('custom_registered_foo_post_type', 'custom_registered_foo_post_type_handler', 10, 2);
function custom_registered_foo_post_type_handler($post_type, $args) {
  remove_action(current_filter(), __FUNCTION__, 10, 2);  // only run once
  // change your args here
  $args['show_ui'] = false;
  // re-register
  register_post_type($post_type, $args); // will call this hook again if it exists, so we removed it above.
}
?>

cpt-field-change-from-child-theme-2.php

<?php
add_action( 'after_setup_theme', 'portfolio_new_labels', 20 );
function portfolio_new_labels()
{
	global $wp_post_types;
	foreach($wp_post_types['portfolio_page']->labels as $label_name => $label_value){
		$wp_post_types['portfolio_page']->labels->$label_name = str_replace('Portfolio','Prodotti',$label_value);

	}
	$wp_post_types['portfolio_page']->rewrite['slug'] = 'prodotti';
	//print_r($wp_post_types);

}
?>