This seems to be happening in a few languages, so I created a bug report (couldn't find anything related in the bug tracker):
bugs.limesurvey.org/view.php?id=13577
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Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.
