How to set a canonical or noindex of a job listing post for multilingual sites?

So I kept improving my code. An SEO expert advised me to set the pages “noindex” and set a canonical as well. Right now I have the following code. I first tried using a Rank Math filter but this conflicted with my $robots filter, so I found this solution:

function modify_rank_math_canonical() {
  $post_id = get_the_ID();
  if (get_post_type($post_id) === 'job_listing') {
      $current_url = home_url(add_query_arg(array(), $wp->request));
      $terms = wp_get_post_terms($post_id, 'job_languages', array('fields' => 'names'));
      $page_uri = get_page_uri($post);
      $home_url = 'https://' . $_SERVER['HTTP_HOST'];
      $full_dutch_slug = $home_url . '/vacature/' . $page_uri;
      $full_english_slug = $home_url . '/en/vacancy/' . $page_uri;
      if (in_array('Nederlands', $terms) && strpos($current_url, '/en/') !== false) {
          remove_action('wp_head', 'rank_math_canonical');
          echo '<link rel="canonical" href="' . esc_url($full_dutch_slug) . '" />' . "\n";
      } elseif (!in_array('Nederlands', $terms) && strpos($current_url, '/en/') === false) {
          remove_action('wp_head', 'rank_math_canonical');
          echo '<link rel="canonical" href="' . esc_url($full_english_slug) . '" />' . "\n";
      }
  }
}
add_action('wp_head', 'modify_rank_math_canonical', 11);

add_filter( 'rank_math/frontend/robots', function( $robots ) {
  $post_id = get_the_ID();
  if ( get_post_type( $post_id ) === 'job_listing' ) {
      $current_url = home_url( add_query_arg( array(), $wp->request ) );
      $terms       = wp_get_post_terms( $post_id, 'job_languages', array( 'fields' => 'names' ) );
      if ( in_array( 'Nederlands', $terms ) && strpos( $current_url, '/en/' ) !== false ) {
          if ( isset( $robots['index'] ) && $robots['index'] === 'index' ) {
              $robots['index']  = 'noindex';
          }
      } elseif ( !in_array( 'Nederlands', $terms ) && strpos( $current_url, '/en/' ) === false ) {
          if ( isset( $robots['index'] ) && $robots['index'] === 'index' ) {
              $robots['index']  = 'noindex';
          }
      }
  }
  return $robots;
});

I think this is ok now and this could be well out of the scope from this support, but if you would be able to comment whether this solution is good use of your documentation, that would suffice. Thanks a lot!

Hi,

Unfortunately not yet resolved. The jobs with the above code stop appearing in Google for Jobs. I checked and a job posted a week ago was not in my sitemap yet. Now I just refreshed the sitemap by changing the amount of links that can be present in the sitemap, which updated it.

Now I see the job https://fiks.nl/vacature/saleslift-studio-stage-sales-bij-ambitieuze-sales-developer-amsterdam-20693/ in my sitemap, but it also listed the noindex job:
https://fiks.nl/en/vacancy/saleslift-studio-stage-sales-bij-ambitieuze-sales-developer-amsterdam-20693/

Two questions:
1. My sitemap does apparently not update itself, how do I fix this?
2. Why does a noindex page end up in my sitemap and how do I get rid of it?

Thanks!

Hello,

I have updated the sensitive data as requested. Can you please check further?

Thank you.

Apologies, the last jobs are both noindex for some reason… Something is setting everything I publish to noindex now. I will figure this out and report back when I have 2 jobs I can share.