Change the WordPress Category name and text on the admin screen

change-category-name.php

<?php
/**
 * Change core category to Channel
 */
if( !function_exists('wcd_rename_category_theme') ) {
    function wcd_rename_category_theme() {

        $singular_name = 'Channel';
        $plural_name = 'Channels';

        $labels = array(
            'name' => $plural_name,
            'menu_name' => $plural_name,
            'singular_name' => $singular_name,
            'search_items' => 'Search ' . $plural_name,
            'popular_items' => 'Popular ' . $plural_name,
            'all_items' => 'All ' . $plural_name,
            'parent_item' => 'Parent ' . $singular_name,
            'parent_item_colon' => 'Parent ' . $singular_name . ':',
            'edit_item'	=> 'Edit ' . $singular_name,
            'view_item'	=> 'View ' . $singular_name,
            'update_item' => 'Update ' . $singular_name,
            'add_new_item' => 'Add New ' . $singular_name,
            'new_item_name' => 'New ' . $singular_name . ' Name',
            'separate_items_with_commas' => 'Separate ' . $plural_name . ' with commas',
            'add_or_remove_items' => 'Add or remove ' . $plural_name,
            'back_to_items' => '← Back to ' . $plural_name,
            'items_list_navigation' => $plural_name . ' list navigation',
            'items_list' => $plural_name . ' list',
        );

        global $wp_taxonomies;
        $wp_taxonomies['category']->labels = (object) array_merge( (array) $wp_taxonomies['category']->labels, $labels );
    }
    add_action( 'init', 'wcd_rename_category_theme' );
}

if( !function_exists('wcd_rename_category_theme') ) {
    function humaan_change_category_name_description( $translated_text ) {
    
        global $current_screen;
        if ($current_screen && $current_screen->taxonomy === 'category') {
    
            switch ( $translated_text ) {
    
                case 'The name is how it appears on your site.' :
    
                    $translated_text = 'Channel links will wrap at one word per line. Try to keep the name to approx. 3 words long.';
                    break;
    
            }
    
        }
    
        return $translated_text;
    }
    add_filter( 'gettext', 'wcd_change_category_name_description', 20, 3 );
}