Sinatolean

Sinatolean(cinadoleya; [ɕinaˈdɔleja]) is the official and national language of the Sinatolean Federation, a federative archipelago nation. Before the unification and subsequent formation of the Federation, Sinatolean was still used as a lingua franca in the region as far back as around 900 BCE. It is the most spoken Sinatolean language, with an estimated 680,000 total native speakers as of 2024.

Sinatolean is a heavily agglutinative language. In fact, the autonym of the language is itself an agglutinated phrase:

cin       -a        dol      -e   ya
person -SING island -PL speech

Thus, cinadoleya means "speech of the island person".