Created attachment 119089 [details] screenshot Umlaut - error for german text (UTF8-error) STEPS TO REPRODUCE 1. open "Drucker einrichten" 2. "Druckeroptionen" OBSERVED RESULT * Label "Druckqualität" EXPECTED RESULT * shold be "Druckqualität" SOFTWARE/OS VERSIONS Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.12.7 KDE Frameworks Version: 5.44.0 Qt Version: 5.9.5 see https://php-de.github.io/jumpto/utf-8/
This text comes from the PPD driver file, can you check if it has valid unicode? Does the text looks right at http://localhost:631 ?
http://localhost:631 also shows the umlaut incorrectly.
I found a file /etc/cups/ppd/Kyocera_ECOSYS_P3045dn.ppd The Editor open this file as UTF-8 and the "ä" is shown correct. It is the only umlaut in that file. The ppd does not start with a BOM.