13 new project subdomains were created: 5 Wikipedia, 2 Wikisource, 2 Wikivoyage, 1 each of Wiktionary, Wikiversity, Wikiquote and Wikinews.
2 others were fully approved, and are awaiting creation: Wikipedia Western Armenian and Wikisource Neapolitan.
4 others are tentatively approved, but are awaiting language verification: Wikipedias in Guianan Creole, Mon and Saraiki, and Wiktionary in Tacawit.

Concerning requests for new languages:

All requests created in 2012 or earlier have now been resolved as "eligible" or "rejected", with the exception of two Wikipedia requests around the Balochi macrolanguage and one of its member languages. (Satdeep Gill was looking into that issue in 2017, but no further progress has been reported. We will circle back to that one shortly.)
All requests created from the beginning of 2017 through 17 December 2018 have also been addressed. Most were marked as "eligible" or "rejected", but 32 are on hold pending test project activity, while the eligibility of one (Literary Chinese Wikisource) is still under review.
All requests for Wikibooks, Wikinews, Wikisource and Wikiversity projects have been addressed. Requests for Wikivoyage and Wikiquote projects from 2013 have also been addressed.
Remaining to do: 72 Wikipedia requests (2013–2016), 21 Wiktionary requests (2013–2016), 9 Wikivoyage (2014–2016), 4 Wikiquote (2015–2016), and four very recent requests.

Concerning requests for project closures: