Issue with Incorrect Homepage URL in Sitemap for Multilingual Site Using Transla

Hello,

We apologize for the issue you are facing with the sitemap on your multilingual WordPress website using Rank Math and TranslatePress. It seems that the incorrect homepage URL is being included in the sitemap, which can be frustrating.

To resolve this issue, you can add a specific piece of code to your theme’s rank-math.php file. This code will help ensure that the correct homepage URL is listed in the sitemap. Here’s the code you should add:

if ( 'page' === get_option( 'show_on_front' ) ) {
    add_filter( 'rank_math/sitemap/entry', 'compsupp_5514_filter_sitemap_home_page_entry', 10, 3 );
}
function compsupp_5514_filter_sitemap_home_page_entry( $url, $type, $post ) {
    global $sitepress;
    static $wpml_home_urls = null;
    static $frontpage_translations = null;
    static $default_frontpage_id = null;
    if ( ! $wpml_home_urls ) {
        $active_languages = $sitepress->get_active_languages();
        $wpml_home_urls   = [];
        foreach ( $active_languages as $code => $language ) {
            $wpml_home_urls[ $code ] = $sitepress->language_url( $code );
        }
        $default_frontpage_id   = get_option( 'page_on_front' );
        $frontpage_trid         = $sitepress->get_element_trid( $default_frontpage_id, 'post_page' );
        $frontpage_translations = array_map( WPMLFPObj::prop( 'element_id' ), $sitepress->get_element_translations( $frontpage_trid, 'post_page' ) );
    }
    if ( in_array( $post->ID, $frontpage_translations ) && $post->ID !== $default_frontpage_id  ) {
        $language_code = array_search( $post->ID, $frontpage_translations );
        $url['loc']    = $wpml_home_urls[ $language_code ];
    }
    return $url;
}

Note: We recommend taking a backup of your website’s file and database before making any changes to the code.

This code should help ensure that the correct homepage URL is reflected in your sitemap. If you continue to experience issues after implementing this solution, please reply to this ticket, and a human agent from the Rank Math Support team will assist you further.

Thank you for raising this concern, and we hope this helps resolve your issue!

Sources:
Multilingual SEO with Rank Math SEO & WPML » Rank Math