Hi Andreas and Fred Thanks for your answers and suggestions! I'm baffled... after the daily resetting of my demo installation the thing that didn't work yesterday does work today... So for example in system preference "OPACXSLTDetailsDisplay" the path "/usr/share/koha/opac/htdocs/opac-tmpl/bootstrap/{langcode}/xslt/MARC21slim2OPACDetail-CUSTOM.xsl" will use the respective file in directory "en" or "de-DE" when changing the language. So I can positively say using {langcode} works as described... although it seems definitely necessary to restart koha-common / apache2 after making some change in the XSLT files. Otherwise you will probably experience confusing behavior of the view in the webbrowser (probably depending on browser caching and/or Plack). Best wishes & happy weekend: Michael -- Geschäftsführer · Diplombibliothekar BBS, Informatiker eidg. Fachausweis Admin Kuhn GmbH · Pappelstrasse 20 · 4123 Allschwil · Schweiz T 0041 (0)61 261 55 61 · E mik@adminkuhn.ch · W www.adminkuhn.ch