Apparently the words for the units don't get applied at all. I haven't tested this yet, but I'll certainly investigate this.
EDIT: Oh dear, that was a terrible bug there. What was I thinking while coding that? I don't know.
To keep it simple: due to a change I made in the preferences structure, the unit words were no longer saved properly in the temporary object (used during run-time) and the registry (used for permanent storage). The good news is that I found were it went wrong and that you can rest assured that
this is fixed in the next version. I apologize for the inconvenience that you'll have to live with this issue for the time being, as I haven't even been able to start a beta testing period yet. There is just too many things to implement and to fix.