Elamite language
A very large Elamite language vocabulary is known from the trilingual Behistun inscription and numerous other bilingual or trilingual inscriptions of the Achaemenid Empire, in which Elamite was written using Elamite cuneiform (circa 400 BCE), which is fully deciphered. An important dictionary of the Elamite language, the "Elamisches Wörterbuch" was published in 1987 by W. Hinz and H. Koch. The Linear Elamite script however, one of the scripts used to transcribe the Elamite language circa 2000 BCE, has remained elusive.