Gerry asked

> Then does SCAAN and Nostratic account for all the world languages?
> If not, what languages remain?

No it doesn't. The Australian, Indo-Pacific, Austroasiatic,
Austronesian, Daic, in Australia and South East Asia are excluded.

In Africa, Khoisan, Niger-Khordofanian, and Nilo-Saharan languages
are not included.

Regards

John