> From: ISO 639 Joint Advisory Committee [mailto:[log in to unmask]] On Behalf Of
> Milicent K Wewerka

> "Patois" (or "Patoues") is not a language name.

I'm inclined to think that "Patois" is used as a language name whenever someone says, "They speak Patois" (though not if someone says, "they speak a patois"). (My French isn't good enough to know how "Ils parlent patois" would be understood.) 

It's just a highly a ambiguous name. And so much so that I would not think it worth while listing as an alternate name.