Show default version if translation isn't found

wpml_show_default.php

<?php
add_filter('icl_ls_languages', 'wpml_ls_filter');
 
function wpml_ls_filter($languages) {
    global $sitepress;
 
    $default_url = $languages[$sitepress->get_default_language()]['url'];
    foreach($languages as $lang_code => $language){
        if($languages[$lang_code]['missing']==1){
            $languages[$lang_code]['url'] = $default_url;
        }
    }
return $languages;
}