return array(
            '{{CUSTOMER_ADDRESS}}'   => __( 'Customer Address', 'lifterlms' ),
            '{{CUSTOMER_NAME}}'      => __( 'Customer Name', 'lifterlms' ),
            '{{CUSTOMER_PHONE}}'     => __( 'Customer Phone', 'lifterlms' ),
            '{{ORDER_ID}}'           => __( 'Order ID', 'lifterlms' ),