add_filter( 'woocommerce_email_recipient_new_order', 'custom_email_recipient_new_order', 10, 2 );
function custom_email_recipient_new_order( $recipient, $order ) {
    // Get the shipping country
    $country_code = $order->get_shipping_country();

    // Get All Zone IDs
    $zone_ids    = array_keys( array('') + WC_Shipping_Zones::get_zones() );

    // Loop through Zone IDs
    foreach ( $zone_ids as $zone_id ) {
        // Get the shipping Zone object
        $shipping_zone = new WC_Shipping_Zone($zone_id);

        // Loop through Zone locations
        foreach ( $shipping_zone->get_zone_locations() as $location ){
            if ( $location->type === 'country' && $location->code === $country_code ) {
                $the_zone_id   = $zone_id;
                $the_zone_name = $shipping_zone->get_zone_name(); // (You can use the the zone name too)
                break;
            }
        }
        if($found) break;
    }

    if( $the_zone_id == 0 ) {
        $recipient .= ',' . 'james.collins@gmail.com';
    } elseif( $the_zone_id == 2 ) {
        $recipient .= ',' . 'jean.dubreuil@gmail.com';
    } elseif( $the_zone_id == 3 ) {
        $recipient .= ',' . 'joel.chalamousse@gmail.com';
    } else {
        $recipient .= ',' . 'isabelle.frottin@gmail.com';
    }

    return $recipient;
}