I found a solution : ''Downgrade'' the package language-pack-kde-fr-base to version 1:6.06+20060427, and Services System panel works fine.
When I install the up-to-date version 1:6.06+20060511, and the bug is coming back... -- "System Services" inaccessible in french https://launchpad.net/bugs/43313 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
