http://manual.koha-community.org/3.18/en/administration.html#l18nprefs 1.8.4. language Default: English Asks: Enable the following languages on the staff interface Values: English To install additional languages you need to run misc/translation/install-code.pl. For example, to install French you would run the following command install-code.pl fr-FR to make the templates, once they exist and are in the right place then they will show up as an option in this preference. ---- misc/translation/install-code.pl is no longer used. To install a language we can refer to http://wiki.koha-community.org/wiki/Installation_of_additional_languages_for_OPAC_and_INTRANET_staff_client The way to install additional languages is different for packages and other installations.
This is fixed.