Albrecht:1397290123 wrote
My wiki is running in a farm (it has been converted from a single wiki to a farm wiki - so it might be the "farmer"), so I expected to find the corresponding lang.php in farm/<domain>/conf/lang/de, but DW uses the common dokuwiki/inc/lang/de.
This would have been a better link:
https://www.dokuwiki.org/localization#changing_localized_texts_in_your_installation
That explains that you need to copy the files over to /conf/lang/de as they don't exist yet. Changing the core files is not a good idea s that will a) make those changes across the whole farm and b) will be lost with the next update.
You would need to add every lang file you'd like to change to your animal's conf folder to prevent that.