When you type HELP in the textbox of LibreLoog toolbar, there is no error, which supposes there is a hidden HELP command, but not functional.
If this the case, this command could open the LibreLogo help screen, just like the F1 keyn inside the textbox.
When i type 'HELP' in the textbox i get a "Unknown name: ‘HELP”." error dialog in Linux Mint. Maybe a HELP command would be useful, though the tooltip of the textbox already states pressing F1 to get help.
Confirmed on LO 4.2.4 and LO 4.3.0 beta1 in Windows 8. If I type HELP in the textbox (in English, even with localized pt-br Libreoffice), there is no error.
That means: the behavior is different with this "hidden" command. ;)
Got the same error dialog when localized in arabic on Linux Mint and tested in english UI on Windows 7 with 4.4a and still got the error dialog.