Here's an updated proposal then:
I envision the following: one forum for European languages, one for NAILs, one for CSAILs (or we can even split it), one for Asian languages, one for AILs (African languages), one for Austronesian languages, one for Australian languages, and one for Papuan languages. The forums for NAILs, CSAILs, and AILs already exist.
In addition, for NAILs, it sounds like what we've come up with so far is: Algic, Iroquoian, Na-Dene, Siouan, Salishan, Eskimo-Aleut, and Uto-Aztecan (7 new forums, 8 in all). I personally would also like to suggest Yuman-Cochimi because this is another language family that is attested on both sides of the border with Mexico. I would also suggest expanding Na-Dene to Dene-Yeniseian; the connection between Yeniseian and Na-Dene seems to be as well established as it possibly could be, and this would also have the advantage of avoiding yet another Eurasian forum.
I also propose the following 41 subforums for Europe, Asia, and part of Africa (not necessarily with these names):
That's 25 forums for languages spoken only in Europe, 9 for languages spoken only in Asia, and 7 for languages that are spoken in a transcontinental area and/or are spoken on more than one continent. The difficulty with reducing the number of forums for European languages is that most major Western European languages are highly popular foreign language choices and among the world's most widely-spoken languages, and merging forums for Eastern European languages may be controversial for political/sociocultural/historical reasons.
For Africa, I propose:
That's 10 new forums.
And now for Central and South America. Hoo boy!
Okay, how about this for the CSAILs?
That's also 10 new forums.
I also propose a Sign Languages forum.
This is just a preliminary proposal and an attempt to represent the language families of each continent more or less equally.