There are also legal considerations. The semantics of the "guest" role in SloanSpace V1 as well as dotLRN are not driven by common sense or needs specific to Sloan, they're driven by Federal Law passed to protect student privacy.
Which opens a globalization issue far trickier than language issues - legal issues! Are there laws regarding student privacy in Germany, for instance?
The Open Force guys can speak to how difficult it will be to adopt dotLRN's permissions architecture to deal with such differences.
