Wordpress register custom taxonomy

register-taxonomy.php

<?php

add_action( 'init', 'steam_register_custom_taxonomy_effect');

/**
 * Register Custom Taxonomy
 *
 * @return void
 */
function steam_register_custom_taxonomy_effect()
{
	$labels = array(
		'name'                      => _x( 'Effects', 'Taxonomy General Name'),
		'singular_name'             => _x( 'effect', 'Taxonomy Singular Name'),
		'menu_name'                 => __( 'Effects'),
		'all_items'                 => __( 'All Effects'),
		'parent_item'               => __( 'Parent effect'),
		'parent_item_colon'         => __( 'Parent effect:'),
		'new_item_name'             => __( 'New effect Name'),
		'add_new_item'              => __( 'Add New effect'),
		'edit_item'                 => __( 'Edit effect'),
		'update_item'               => __( 'Update effect'),
		'separate_items_with_commas'=> __( 'Separate effects with commas'),
		'search_items'              => __( 'Search effects'),
		'add_or_remove_items'       => __( 'Add or remove effects'),
		'choose_from_most_used'     => __( 'Choose from the most used effects'),
	);

	$args = array(
		'labels'                    => $labels,
		'hierarchical'              => false,
		'public'                    => false,
		'show_ui'                   => true,
		'show_admin_column'         => true,
		'show_in_nav_menus'         => true,
        'show_tagcloud'             => true,
        'rewrite' => array( 'slug' => 'product-effects', 'with_front' => false ),
	);

    register_taxonomy( 'effect', ['product'], $args );
}