[Koha-devel] where to set sitewide character encoding?

Hi, I was wondering where to set sitewide character encoding for the Polish language. In the httpd.conf or in a file of koha distro? Is there such single file? Say, I translate opac.pl using kate and utf-8... Then I update the directories with ./tmpl_process. I can't enjoy utf-8 because koha defaults to iso-8859-1. Paul, how did you menage to set it in the French language? French uses iso-8859-2. Benedict