Display the country code on specific menu location with wpml

display_country_code_wpml.php

// Filter wp_nav_menu() to add additional links and other output
function new_nav_menu_items($items,$args) {
  if ($args->theme_location == 'primary-menu') {
    if (function_exists('icl_get_languages')) {
      $languages = icl_get_languages('skip_missing=0');
      if(1 < count($languages)){
        foreach($languages as $l){
          if(!$l['active']){
          $items = $items.'<li class="menu-item menu-item-type-custom menu-item-object-custom current-menu-item current_page_item menu-item-00000"><a href="'.$l['url'].'">'.$l['language_code'].'</a></li>';
          }
        }
      }
    }
  }
   
  return $items;
}

add_filter( 'wp_nav_menu_items', 'new_nav_menu_items',10,2 );