I think the problem with words is that they mean something else for everyone, and this gets worse if you are from different backgrounds or languages.
Therefore, I think you should keep with the default vocabulary as much as possible. That way it becomes something you actually don't care about, it's not about those words / names, but about the new way of working.
If you focus on getting the wording "right" you're focussing on the wrong things: mostly, fitting Holacracy into other people's existing ideas about it instead of a shared new thing.
Hope this makes sense, somewhat paradoxically maybe