Brono-Fathanic is a language spoken on Calémere, mainly in the independent countries of Brono and Fathan in central-northeastern Isungatsuaq. While a single language, it is usually considered two languages: Bronic (natively fehoavana Barônata) and Fathanic (natively fiuavan Fathaŋeuth), as each country uses their own dialect as standard. The name Brono-Fathanic is mostly used in foreign literature, particularly Chlegdarim (Br.: fehoavana Barôna-Fatangeata; Fath.: fiuavan Barən-Fathaŋeuth; Laceyiam: Hroṃhvaþani hėnna). The two standardized dialects mostly differ in phonology and vocabulary, as grammar and syntax are mostly the same.
Brono-Fathanic is the only surviving Naumilāni language, as its only attested relative is the former Ancient Naumilā-Maidikairi which was spoken to the south and eventually replaced by Laceyiam after the Chlegdarim conquests. The Chlegdarims never fully assimilated Brono and Fathan, but the Brono-Fathanic people converted to the Yūnialtia and they have adopted many aspects of Chlegdarim culture anyway; Brono and Fathan also were parts of Laltīmāhia for a time (with Fathan becoming independent only in the last fifty years). Due to this relationship, both standards of Brono-Fathanic have lots of loanwords from Laceyiam, though heavily modified to suit native phonotactics (with some notable examples being Br. neaṅikyaha / Fath. neŋikyaheu "Yūnialtei temple" from Lac. nälikhiąa ; irodratruya / irodrətruyam "internet" < irūḍaṭūyam ; or ongasikeara / eungasəker "land reclamation" < øngarṣkėram).
There are about 32 million native speakers of Brono-Fathanic; about 80% live in Brono, 19% in Fathan and the rest are either diaspora or in the neighboring countries - the Cerian States of Isungatsuaq to the north and Laltīmāhia (particularly in the dioceses of Hvyanantsaka (a toponym which is an adaptation of Bronic Feanoantsaka), Ūṣmunaum, and Maidaśama) to the south.