Luwian is an extinct language of the Anatolian branch of the Indo-Europeanlanguage family.
From the en.wikipedia.org
Luwian is closely related to Hittite, and was among the languages spoken during the second and first millennia BC by population groups in central and western Anatolia and northern Syria.
From the en.wikipedia.org
Luwian speakers gradually spread through Anatolia and became a contributing factor to the downfall, after c. 1180 BC, of the Hittite Empire, where it was already widely spoken.