Koha-clms/installer/data/mysql/pl-PL/optional/parameters.sql

INSERT INTO `currency` (currency, rate, symbol, active) VALUES
('PLN', 1.0, 'zł', '1'),
('USD', .2988, '$', '0'),
('GBP', .1903, '£', '0'),
('EUR', .2403, '€', '0');