BiharI means the language of the province of Bihr, and to a certain extent this is a true description.
The genius of the Biharilanguage is adverse to the existence of a long vowel in a tad bhava word, when it would occupy a position more than two syllables from the end.
In the modern language the distinction is in the main confined to animate beings, but in the older poetry the system of grammatical, as distinct from sexual, gender is in full swing.