Firen
Firen was the primary language in what has become the eastern states of the Union of Six. It may be considered "Proto-Fulren", the primary language of the Empire.
Firen is am agglutinative and highly-inflected language with mostly ergative-absolutive alignment, however particularly active verbs mark their subject in the ergative case (this is called "Split-S" alignment) and fairly free word order, but the most basic word order is VSO. It has 17 cases, 6 moods, 5 voices, and 3 noun classes based on an animacy hierarchy.