Many thanks - worked perfectly
A couple of post above, you said
I've tried to swap language of WinCC flexible workbench to "German" as suggested by Nemo but in "Options", "Settings", "Workbench", "User interface language" the only choice is English (United States).
I have a similar issue, my choices are only: english US, french, Spanish, german, italian.
None of them have the field #330018 in system settings.
How did you succed to find it?