Old Italian language

[Caoimhin O Donnaile]

> This is far from a formal proposal, but editors on Wiktionary turned out 
> to be labeling some entries "Old Italian", and a discussion there has 
> ensued. Do the experts here think that this is something for ISO 639-3 
> or that there's a major (sub 639-3) division that's worth tagging here?

I am not an expert, but for what it is worth, multitree.org (formerly 
multitree.linguistlist.org) has an internal code “1et” for “Old Italian”, 
which it labels as a “language”:

    http://multitree.org/codes/1et

Caoimhín