Why is N'ko included in ISO 639-3 and not in Ethnologue? Aren't they
supposed to have the same codes at least for individual
languages? It was added to 639-2 in May 2006-- is this just a result of
its publication schedule that it is not yet included? I had a question
from the German Library questioning whether it was only a script and not
a language and they noted that it wasn't in Ethnologue.