The language of KStars cannot be changed and always uses the OS language. Tried to change within "Hilfe - Sprache einrichten" (Help - Switch Application Language). After a restart of KStars the settings are ignored and the language of the OS is still used. Tried on Windows 11, Ubuntu 23.10 and a compiled version of KStars on Raspberry PI Bookworm with the same result.
Yes I can confirm the issue as well
Git commit 33637a667cc60ea455d83acb81d36c3c1f9fc38c by Jasem Mutlaq. Committed on 21/06/2024 at 17:42. Pushed by mutlaqja into branch 'master'. Fix bug that caused KStars selected program language to not load properly. Related: bug 458412, bug 470505, bug 440581 FIXED-IN:3.7.2 M +5 -4 kstars/ekos/scheduler/scheduler.cpp https://invent.kde.org/education/kstars/-/commit/33637a667cc60ea455d83acb81d36c3c1f9fc38c
Git commit 1642532bf89d85750e265fd092fc1a04c4a4ee6c by Jasem Mutlaq. Committed on 21/06/2024 at 17:44. Pushed by mutlaqja into branch 'stable-3.7.1'. Fix bug that caused KStars selected program language to not load properly. Related: bug 458412, bug 470505, bug 440581 FIXED-IN:3.7.2 M +5 -4 kstars/ekos/scheduler/scheduler.cpp https://invent.kde.org/education/kstars/-/commit/1642532bf89d85750e265fd092fc1a04c4a4ee6c