Dyéwiskos language (Proto-Tëaisco)
Dyéwiskos is the language spoken by the Tíwos when they arrived in Erthas towards the end of the First Age, and presumably, by the Tuhintis. By the end of the First Age, it had been reduced in form to Old Tëaisco, under the influence of the various human peoples who flocked to the banner of the Tíwos.