Question: What extinct language is on the Stele of Meli-Šipak and is spoken by the ancient Elamites?

Context paragraphs:
Endangered language: An endangered or moribund language is a language that is at risk of falling out of use as its speakers die out or shift to speaking another language.  Language loss occurs when the language has no more native speakers and becomes a "dead language".  If no one can speak the language at all, it becomes an "extinct language".  A dead language may still be studied through recordings or writings, but it is still dead or extinct unless there are fluent speakers.  Although languages have always become extinct throughout human history, they are currently dying at an accelerated rate because of globalization and neocolonialism.

Elamite language: Elamite is an extinct language that was spoken by the ancient Elamites.  It was used in present-day southwestern Iran from 2800 to 550 BC.  The last written records in Elamite appear around the conquest of the Achaemenid Empire by Alexander the Great.  Elamite has no demonstrable relatives and is usually considered a language isolate.  The lack of established relatives is one reason for its interpretation being difficult.

Stele of Meli-Šipak: The Stele of Meli-Šipak is an ancient Mesopotamian fragment of the bottom part of a large rectangular stone edifice engraved with reliefs and the remains of Akkadian and Elamite inscriptions.  It was taken as spoil of war by Elamite king Šutruk-Naḫḫunte I during his invasion of Babylonia which deposed Kassite king Zababa-šuma-iddina.  It was one of the objects found at Susa between 1900 and 1904 by the French excavation team under Jacques de Morgan that seems to have formed part of an ancient Museum of trophies, or "ex-voto" offerings to the deity Inšušinak, in a courtyard adjacent to the main temple.

Armazi stele of Vespasian: The Armazi stele of Vespasian (Georgian: ვესპასიანეს არმაზის სტელა ) is a stele with Ancient Greek inscriptions found in 1867 at Armazi, near Mtskheta, Georgia in the ancient capital of the Kingdom of Iberia.  The stele memorialises reinforcement of fortification of Armazi walls by Emperor Vespasian.  Additionally, the inscription mentions two emperors Titus, Domitian and two kings Mihrdat I of Iberia, Pharasmanes I of Iberia and prince royal Amazaspus.  The inscription is dated 75 AD.  The top of the stele is lost.  According to Professor David Braund the missing text was in Latin or Armazic (outgrowth of Aramaic language).  Cyril Toumanoff identifies Amazaspus as King Amazasp I of Iberia, though it can be prince royal Amazaspus, son of Pharasmanes I of Iberia, who is known from the Epigram of Amazaspos found in Rome.

Carian language: The Carian language is an extinct language of the Luwian subgroup of the Anatolian branch of the Indo-European language family.  The Carian language was spoken in Caria, a region of western Anatolia between the ancient regions of Lycia and Lydia, by the Carians, a name possibly first mentioned in Hittite sources.  Prior to the late 20th century CE the language remained a total mystery even though many characters of the script appeared to be from the Greek alphabet.  Using Greek phonetic values of letters investigators of the 19th and 20th centuries were unable to make headway and classified the language as non-Indo-European.  Speculations multiplied, none very substantial.  Progress finally came as a result of rejecting the presumption of Greek phonetic values.

Elymais: Elymais or Elamais (Ἐλυμαΐς, Hellenic form of the more ancient name, Elam) was a semi-independent state of the 2nd century BC to the early 3rd century AD, frequently a vassal under Parthian control, and located at the head of the Persian Gulf in the present-day region of Khuzestan, Iran (Susiana).  It is reported that these people were great archers and natives of Susa, which lay to the east of Elymais territory.  Most of the Elymais were probably descendants of the ancient Elamites, who once had control of that area in the past.  The provinces of Elymais were Massabatice (later Masabadhan), Corbiane and Gabiane.

Xanthian Obelisk: The Xanthian Obelisk, also known as the Xanthos or Xanthus Stele, the Xanthos or Xanthus Bilingual, the Inscribed Pillar of Xanthos or Xanthus, the Harpagus Stele, and the Columna Xanthiaca, is a stele bearing an inscription currently believed to be trilingual, found on the acropolis of the ancient Lycian city of Xanthos, or Xanthus, near the modern town of Kınık in southern Turkey.  The three languages are Ancient Greek, Lycian and Milyan (the last two are Anatolian languages and were previously known as Lycian A and Lycian B respectively).  During its early period of study, the Lycian either could not be understood, or was interpreted as two dialects of one language, hence the term, bilingual.  Another trilingual from Xanthus, the Letoon trilingual, was subsequently named from its three languages, Greek, Lycian A and Aramaic.  They are both four-sided, both trilingual.  The find sites are different.  The key, unequivocal words are bilingual, Letoon, Aramaic, Lycian B, Milyan.  The equivocal words are stele, trilingual, Xanthus or Xanthos.  "The Xanthus inscription" might refer to any inscription from Xanthus.

El Molo language: El Molo is a possibly extinct language belonging to the Cushitic branch of the Afro-Asiatic language family.  It was spoken by the El Molo people on the southeastern shore of Lake Turkana, in northern Kenya.  It was thought to be extinct in the middle part of the 20th century, but a few speakers were found in the later 20th century.  However, it may now be truly extinct, as the eight speakers found in a survey published in 1994 were over 50.  Most of the El Molo population have shifted to the neighboring Samburu language.

Paleo-Corsican language: The Paleo-Corsican language is an ancient extinct language spoken in Corsica and presumably in the northeastern part of Sardinia (Gallura) from the local Corsican populations during the Bronze Age and the Iron Age.  The scanty evidence of this ancient language, which came mainly from toponymy, would indicate a type of Pre-Indo-European language, or according to other Indo-European, with Ligurian and Iberian affinity.

Liburnian language: The Liburnian language is an extinct language which was spoken by the ancient Liburnians, who occupied Liburnia in classical times.  Classification of the Liburnian language is not clearly established; it is reckoned as an Indo-European language with significant proportion of the Pre-Indo-European elements from wider area of the ancient Mediterranean.

Supporting paragraphs: Stele of Meli-Šipak Elamite language
Answer: Elamite