As I user I'd like to switch to offline mode and I'd like to read the help in my native language (the current setting of the MicroStation GUI).

Each language pack installation (and full installation containing language pack) should have a set of html files which are copied to C:\ProgramData\Bentley\Documentation\MicroStation\[version]\[lang. code]\htm\

When accessing the help from within MicroStation the help files corresponding to the GUI setting should be accessed.