[Closed] Canonical URL Issue

Background of the issue:
I am trying to resolve an issue with the canonical URL of my site. The site’s original language is Dutch, and I have used the WPML plugin to translate it to English. In English pages, the canonical URL is shown properly, but in Dutch pages, the canonical URL fetches the respective English page URL instead of the original Dutch URL. I tried using the following code to modify the canonical URL structure, but it did not work:

add_filter( 'aioseo_canonical_url', 'aioseo_filter_canonical_url' );

function aioseo_filter_canonical_url( $url ) {
//   if ( is_singular() ) {
    //   return '';
//   }
    $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "<em><u>hidden link</u></em>" : "<em><u>hidden link</u></em>";
    $current_url = $protocol . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    // $url = get_current_url();
    return $current_url;
}

Link to a page where the issue can be seen: hidden link

Symptoms:
The URL of the site should be the canonical of the page, but instead, the translated pages, i.e., the respective English page URL, are fetched for canonical in Dutch pages.

Questions:
Why is the canonical URL of the Dutch pages fetching the respective English page URL instead of the original Dutch URL?
How can I modify the canonical URL structure to show the correct URL for Dutch pages?