This translation is incomplete in Czech and has, AFAIK, no bug waiting for the maintainer to apply. Would you guys mind completing it? http://i18n.debian.net/material/po/unstable/main/m/mantis/debian/po/mantis_1.1.8+dfsg-7_cs.po.gz (this one seems to be trivial but you really need to *not* translate "administrator" as this is the name of the account)