$myPosts = get_posts(array(
    'suppress_filters' => false
));

$lang='en';
$title='The title you are searching!';

    function getWpIdByTitle($title, $lang){
        global $sitepress;
        // WPML Super power language switcher...
        $sitepress->switch_lang( $lang );
        $args = array(
          'title'        => $title,
          'post_type'   => 'your-post-type', // Default: post
          'post_status' => 'publish',
          'suppress_filters' => false,
          'numberposts' => 1
        );
        $wp_query = new WP_Query( $args );
        return $wp_query->post->ID;
    }