The taxonomy system doesn't have any meta_data feature. Without constructing another table, your option seems to me to be to store the taxonomy information in the $wpdb->options table using the appropriate functions.
Honestly, I can't help but think that you are trying to use the taxonomy system for something beyond what it was meant for and that you should be considering post meta or a custom post type.
Or, you should be using multiple taxonomines-- one for directory, one for the director's nationality, etc.
I would say to use the multiple taxonomies, or create your own table to hold the taxonomy meta. I worry about performance though. The taxonomy queries are complicated.