navmenu

The content between the li tags could be anything You want!

For example shortcode for language switcher, social icons or custom text.

// =========================================================================
// ADD CUSTOM MENU ITEM TO THE WORDPRESS NAV MENU
// =========================================================================
function add_custom_menu_item ($items, $args) {
    $items .= '<li id="menu-item-5000" class="menu-item menu-item-type-post_type menu-item-object-page last">';
        $items .= 'Last Menu Item';
    $items .= '</li>';
    return $items;
}
add_filter( 'wp_nav_menu_items', 'add_custom_menu_item', 10, 2 );