Use LibreOffice in German UI. Open Draw, draw a shape, e.g. a rectangle, and select it. Open menu "Form" (EN Shape). Notice, that there are two items "Umwandeln". The upper is "Transformations" in EN, the lower one "Convert" in EN. The German UI should use a different term for the upper one, e.g. "Transformationen". This item exists too in the toolbar. In older versions the tooltip was "Modus" and the title of this sub-toobar when detached was "Effekte". That was bad too. So do not go back to the old version, but change tooltip and title there too corresponding to the change in the menu.
On pc Debian x86-64 with master sources updated today, I could reproduce this. The string is here: https://translations.documentfoundation.org/translate/libo_ui-master/officecfgregistrydataorgopenofficeofficeui/de/?checksum=b98c73b1090fbec6&q=note%3A9yBgu&sort_by=-priority%2Cposition It seems, there have been several translations with the time. also I can find it too in: https://translations.documentfoundation.org/translate/libo_ui-master/officecfgregistrydataorgopenofficeofficeui/de/?q=note%3AUdUPE&sort_by=-priority%2Cposition&checksum= https://translations.documentfoundation.org/translate/libo_ui-master/officecfgregistrydataorgopenofficeofficeui/de/?q=note%3AAoqtG&sort_by=-priority%2Cposition&checksum= and of course in helpcontent at different locations, eg: https://translations.documentfoundation.org/translate/libo_help-master/textsdrawguide/de/?checksum=f1b94607acf20481&q=note%3AGoxPE&sort_by=-priority%2Cposition (but translated as a former way with "Verändern") If you want, I can make the change or perhaps you prefer discussing it with German community?
We will discuss it [1] in the German community. It seems it is a regression compared to LO 25.2. [1] https://listarchives.libreoffice.org/de/users/2025/msg00307.html
It is now "Verändern" for English "Transformation" (.uno:AdvancedMode) and "Umwandeln" for English "Convert" (.uno:ConvertMenu). I see the fix in Version: 26.2.0.0.alpha0+ (X86_64) / LibreOffice Community Build ID: 77b3fe6e8564ea579d8e9a5fc82c5eadf532072e CPU threads: 32; OS: Windows 11 X86_64 (build 26100); UI render: Skia/Vulkan; VCL: win Locale: de-DE (de_DE); UI: de-DE Calc: threaded