portfolio_entries tax base won't translate

Hi,
We’re developing a corporate site and we are facing a big problem trying to translate the taxonomy base slug.
Our thought was that if we registered our custom post and taxonomies the way u register portfolio post type we would be able to translate the base slug… but it didn’t worked. Later I tried translating the portfolio base and it doesn’t work either.

I have the latest update of enfold and WPML installed.
Example of our CPT & Tax:

add_action('init', 'news_register_extended', 999 );
function news_register_extended()
{
    global $avia_config;

    $labels = array(
        'name' => _x('News Items', 'post type general name','avia_framework'),
        'singular_name' => _x('News Entry', 'post type singular name','avia_framework'),
        'add_new' => _x('Add New', 'portfolio','avia_framework'),
        'add_new_item' => __('Add New Item Entry','avia_framework'),
        'edit_item' => __('Edit News Entry','avia_framework'),
        'new_item' => __('New Entry','avia_framework'),
        'view_item' => __('View News Entry','avia_framework'),
        'search_items' => __('Search News Entries','avia_framework'),
        'not_found' =>  __('No News Entries found','avia_framework'),
        'not_found_in_trash' => __('No News Entries found in Trash','avia_framework'),
        'parent_item_colon' => ''
    );

    $permalinks = get_option('avia_permalink_settings');
    if(!$permalinks) $permalinks = array();

    $permalinks['news_permalink_base'] = empty($permalinks['news_permalink_base']) ? __('news-item', 'avia_framework') : $permalinks['news_permalink_base'];
    $permalinks['news_entries_taxonomy_base'] = empty($permalinks['news_entries_taxonomy_base']) ? __('news_entries', 'avia_framework') : $permalinks['news_entries_taxonomy_base'];

    $args = array(
        'labels' => $labels,
        'public' => true,
        'show_ui' => true,
        'capability_type' => 'post',
        'hierarchical' => false,
        'rewrite' => array('slug'=>_x($permalinks['news_permalink_base'],'URL slug','avia_framework'), 'with_front'=>false),
        'query_var' => true,
        'show_in_nav_menus'=> true,
        'taxonomies' => array('post_tag'),
        'supports' => array('title','thumbnail','excerpt','editor','comments')
    );

    $args = apply_filters('avf_news_cpt_args', $args);
    $avia_config['custom_post']['news']['args'] = $args;

    register_post_type( 'news' , $args );

    $tax_args = array(
        "hierarchical" => true,
        "label" => "News Categories",
        "singular_label" => "News Category",
        "rewrite" => array('slug'=>_x($permalinks['news_entries_taxonomy_base'],'URL slug','avia_framework'), 'with_front'=>true),
        "query_var" => true
    );

    $avia_config['custom_taxonomy']['news']['news_entries']['args'] = $tax_args;

    register_taxonomy("news_entries", array("news"), $tax_args);

    //deactivate the avia_flush_rewrites() function - not required because we rely on the default wordpress permalink settings
    remove_action('wp_loaded', 'avia_flush_rewrites');
}

Please help : ) and thank you for your effort with this theme.