Hello, this is a now know bug in Koha and occurs with every language. I´m using Debian 11, but Debian 12 has this too. There is a quick fix to solve the problem until a new patch is issued: (all as root) apt install node-po2json edit /usr/share/koha/misc/translator/LangInstaller.pm and change in line 56 $self->(po2json) = "yarn run po2json"; with hardcoded (on Debian 11) $self->(po2json) = "/usr/bin/node-po2json"; or (if Debian 12) $self->(po2json) "/usr/share/nodejs/po2json/bin/po2json"; For more information, please read the articles at koha-mattermost town square. Andreas -- Dr. Andreas Tomiak Bibliotheksleiter ORCID https://orcid.org/0000-0002-3952-5416 SCOPUS Author ID 16450079500 ResearcherID M-5165-2015 SSR DEA900130625 GND 1132720850 VIAF ID 166149616483803750669 http://viaf.org/viaf/166149616483803750669 Call sign DH7ADR Tel.: +49 30 8062 42593, +49 160 9360 2804, Fax: +49 30 8062 42953 ________________________________________________________________________________________________ Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Mitglied der Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren e.V. Aufsichtsrat: Vorsitzender Dr. Volkmar Dietz, stv. Vorsitzende Dr. Jutta Koch-Unterseher Geschäftsführung: Prof. Dr. Bernd Rech, Thomas Frederking Sitz Berlin, AG Charlottenburg, 89 HRB 5583 Postadresse: Hahn-Meitner-Platz 1 14109 Berlin Deutschland Ringgold ID (RIN) 28340 ISNI http:/isni.org/isni/0000000110903682 ROR https://ror.org/02aj13c28 GRID https://grid.ac/institutes/grid.424048.e