Hey Dave — just dropping in via qaartsiluni. I really enjoyed this review, which introduced me to Agner’s work. Thanks for your mention of Azalais — I hope you don’t mind a quibble — Old Occitan is only “dead” in the same way as Middle English is — it has a modern descendent: http://en.wikipedia.org/wiki/Occitan_language.
I mention it mainly because Occitan speakers have suffered discrimination and in fact continue to, especially in France. Thanks again for the review and the link.