Custom taxonomy in URL as category

function taxonomy_article() {
   $labels = array(
    'name'              => _x( 'Article Categories', 'taxonomy general name' ),
    'singular_name'     => _x( 'Article Category', 'taxonomy singular name' ),
    'search_items'      => __( 'Search Article Categories' ),
    'all_items'         => __( 'All Article Categories' ),
    'parent_item'       => __( 'Parent Article Category' ),
    'parent_item_colon' => __( 'Parent Article Category:' ),
    'edit_item'         => __( 'Edit Article Category' ), 
    'update_item'       => __( 'Update Article Category' ),
    'add_new_item'      => __( 'Add New Article Category' ),
    'new_item_name'     => __( 'New Article Category' ),
    'menu_name'         => __( 'Article Categories' ),
  );
  $args = array(
    'labels' => $labels,
    'hierarchical' => true,
    'rewirte' => array('slug' => 'articles/%article_category%', 'with_front' => true),
  );
  register_taxonomy( 'article_category', 'article', $args );
}

add_action( 'init', 'taxonomy_article', 0 );


function article_init() {
    $args = array(
      'label' => 'Article',
        'description' => 'Article to write',
        'public' => true,
        'show_ui' => true,
        'capability_type' => 'post',
        'hierarchical' => true,
        'menu_position' => 5,
        'has_archive' => true,
        'rewrite' => array('slug' => 'articles/%article_category%', 'with_front' => true),
        'with_front' => true,
        'menu_icon' => 'dashicons-format-quote',
        'supports' => array(
            // 'title',
            // 'editor',
            // 'custom-fields'
            )
        );
    register_post_type( 'article', $args );
}

add_action( 'init', 'article_init' );