Twelve Nations

The Twelve Nations refers to the civilizations which emigrated from the Bloatlands during the Exodus and resettled in the Thinlands. These were the following:
# The Tenuvians (pseudo-Latins)
# The Semivians (pseudo-Greeks)
# The Kustlanders (pseudo-Dutch)
# UNNAMED (pseudo-Germans)
# The Londrians (pseudo-English)
# The Pales (pseudo-Celts)
# The Hayonids (pseudo-Armenians)
# The Sloveny (pseudo-Slavs) (who have since split into the Istosloveny and Juzhosloveny)
# The Yazigs (pseudo-Iranians)
# The Baltos (pseudo-Baltic peoples) (extinct)
# UNNAMED (pseudo-Albanians) (extinct)
# The Pakis (pseudo-Indic/Romani peoples) (mostly extinct)
These nations were predestined to arrive in the Thinlands per an ancient Mormon prophecy (in which they are referred to as the Twelve Tribes), and they were meant to settle ethnopolises around Twelve Monoliths scattered throughout the Thinlands. However, due to Nagelite meddling, this prophecy was disturbed, and various nations settled in the incorrect locations. In addition, the Baltos were conquered and assimilated into the Istosloveny branch of the Sloveny, while the pseudo-Albanians were genocided by the Semivians and the Juzhosloveny branch of the Sloveny. The Pakis refused to settle an ethnopolis, instead living in caravans or parasitically in other nations' ethnopolises, until they were largely genocided themselves.
Since the Exodus, new nations have been come about on the Thinlands, mostly due to miscegenation with lesser peoples.
# The Stink People - Native to Boarswallow, these people are largely a mixture of Londrians and Whatchamacallit indigenes. They speak the Londrian language, albeit it very poorly.
# Pepetulos - Native to the island of Pepetela, these people are the descendants of Don Fredo Cuomo (an ethnic Tenuvian) and the female survivors of his shipwreck consisting of Libongo slaves from the city of Múseke — as a result, they commonly refer to their own Pepetulan language as a língua cuomilheira (Cuomo Island Language) and themselves as Cuomilheiros (Cuomo Islanders).
# Priskastelers - The permanent inhabitants of the city of Prikastel. A cosmopolitan city state, the local inhabitants are primarily mixed descendants of the Nigyar workslaves who built the city, Juzhosloveny merchants and refugees from the Burnt Hills, and Tenuvian merchants and tax dodgers. Much like the real-world Singapore, Prikastel has four official languages: 1.) Tenuvian, 2.) Juzhosloveny, 3.) Nigyar, and 4.) Londrian (being the predominant trade language of the Thinlands).