Dunmeri though? You mean the oblivion script? I wasn't ware of any distinct Dunmeri language usage beyond that...or do you mean the obscure metaphysics in Vivec's Sermons? :unsure:
No, he's talking about the dialect that's used in Morrowind, some of which is derived from Aldmeri. Mora is an Aldmeri word meaning forest, Bal means stone, so Balmora means stone forest, and Hermaeus Mora means "The Woodland Man" or even, as implied in the Census of Daedric Realms, "Man Forester". Aldmeri words also pop up in http://www.imperial-library.info/obscure_text/watergettinggirl.shtml.
The obscure metaphysics in Vivec's Sermons is Ehlnofex, which predated all of them. It's arguably the most enjoyable because it seems to be made up more of poetic associations than references to concrete things, making it quite unlike the exhaustingly and exhaustively mapped nerd-fests we've come to expect and which I usually wouldn't care about.
Ayleidic is just disappointing. I'd prefer if languages are made up as they're being written, like Yoku, rather than stolen from Tolkien. It gives them their own sort of flavour when you try to read them, and doesn't recall someone else's works which, although enjoyable enough in their own right, is so prevalent for the inspiration of fantasy that it's better if one fantasy series at least tries to distance itself from it.