Yoast Seo breadcrumbs – How to add text to before categorry/tags

I found something like this, but I have no idea how to add a category and tags there. I can add a category url, but I want a text in front of each category and tag.

<?php
/********* DO NOT COPY THE PARTS ABOVE THIS LINE *********/

/*
 * Add a link to the Yoast SEO breadcrumbs
 * Credit: https://wordpress.stackexchange.com/users/8495/rjb
 * Last Tested: Nov 30 2018 using Yoast SEO 9.2 on WordPress 4.9.8
 *********
 * DIFFERENT POST TYPES
 * Post: Change 123456 to the post ID
 * Page: Change is_single to is_page and 123456 to the page ID
 * Custom Post Type: Change is_single to is_singular and 123456 to the 'post_type_slug'
    Example: is_singular( 'cpt_slug' )
 *********
 * MULTIPLE ITEMS
 * Multiple of the same type can use an array.
    Example: is_single( array( 123456, 234567, 345678 ) )
 * Multiple of different types can repeat the if statement
 */

add_filter( 'wpseo_breadcrumb_links', 'yoast_seo_breadcrumb_append_link' );

function yoast_seo_breadcrumb_append_link( $links ) {
    global $post;

    if ( is_single ( 123456 ) ) {
        $breadcrumb[] = array(
            'url' => site_url( '/blog/' ),
            'text' => 'Blog',
        );

        array_splice( $links, 1, -2, $breadcrumb );
    }

    return $links;
}