Troy?
The only writing found at Troy (predating the classical Greek and Roman periods of habitation there) is a single seal in Luwian, but it dates from some decades after the likely date of the Trojan War. It’s possible that Luwian was the language spoken in Troy before the Trojan War, but that is uncertain—the language spoken there at the time the seal was made may have been different, and it could be that Luwian was used for interstate communications by people speaking different local languages.