Hello, If you are using one of those 3 languages please put you in touch with me. We are going to remove the installer data files for the specific languages and we need to know if there is special data in those files you would like to keep. The plan is to remove them in 21.05. See related bug reports: Bug 27829 - [OMNIBUS] Remove specific LANG installer data https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27829 Bug 24871 - Add new *-installer-*.po translation files https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=24871 Bug 24973 - Allow to localize and translate system preferences with new yaml based installer https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=24973 Regards, Jonathan