 Once the Edain settled in Beleriand, they eagerly learned Sindarin from its Grey Elven inhabitants, but retained their own tongue, probably whilst borrowing and adapting many Sindarin words to it.By the end of the First Age, Taliska had developed into a language that served as the basis for Adûnaic, the vernacular tongue of the Númenóreans, as well as the languages of the Rohirrim and the Men of Dale.In Númenor, Adûnaic was the language used in day-to-day affairs by the majority of the population (though Sindarin was probably spoken by many).