Coins from Side were first discovered in the 19th century, which bore legends in a then-unknown script. In 1914, an altar came to light in Side with a Greek inscription and a Sidetic one, but the latter could not be deciphered. It was only after the discovery of a second Greek-Sidetic bilingual inscription in 1949, that Hellmut Theodor Bossert was able to identify 14 letters of the Sidetic script using the two bilinguals.2 In 1964 a large stone block was unearthed near the east gate of Side, with two longer Sidetic texts, including loan words from Greek (istratag from στρατηγός, 'commander' and anathema- from ἀνάθημα, 'votive offering'). In 1972, a text was found outside Side for the first time, at the neighbouring town of Lyrbe-Seleukia. Currently, eleven Sidetic coins and several coins with Sidetic legends are known.
In addition to the inscriptions, two Sidetic words are known from ancient Greek texts: ζειγάρη for cicada,3 mentioned by the ancient lexicographer Hesychius, and λαέρκινον for Valeriana, cited by Galen. In addition, it is believed that some incomprehensible characters in the third book of Hippocrates' Epidemics were originally quotations of the doctor Mnemon of Side, which might have been in the Sidetic script.4
The designated number and date of discovery are given:
In addition a few Sidetic words have been handed down via classical authors, though not written in Sidetic script: "laerkinon" (λαέρκινον, = the herb valerian), "zeigarê" (ζειγάρη, a cricket, cicada).10
Texts in the Sidetic language are written right to left in an alphabet of 31 distinct letters in inscriptions, plus another 4 characters found only on coins. Since the 2010s consensus has grown with regard to the transliteration of the characters. D2, n2 and s2 have similar sound values to d, n and s, perhaps even allophones:11
The values of two-thirds of the letters are now firmly established, but there are still significant uncertainties: for example, while the majority view is that the frequent vertical strokes ( or ) are a character denoting a sibilant (z or s), that as a genitival ending would fit in nicely with the usual paradigms of the Anatolian languages,12 others interpret the strokes as word dividers.13
The inscriptions show that Sidetic was already strongly influenced by Greek at the time when they were created. Like Lycian and Carian, it was part of the Luwian language family. However, only a few words can be derived from Luwian roots, like maśara 'for the gods' (Luwian masan(i)-, 'god', 'divinity'), and, possibly, malwadas 'votive offering' (Luwian malwa-; but alternative readings are possible, for example, Malya das, 'he dedicated to Malya [= Athena]'). It has been argued that there were also Anatolian pronouns (ev, 'this'; ab, 'he/she/it'), conjunctions (ak and za, 'and'), prepositions (de, 'for'), and adverbs (osod, 'there').
The declension of nouns basically follows a familiar Anatolian language pattern:1415
No verbs have yet been securely identified. A promising candidate is ozad, 'he offered', dedicated' (twice attested with object anathemataz, 'sacrifices'), a 3rd person singular preterite with the common Anatolian ending -d.
Like the neighbouring Pamphylian language, aphaeresis is frequent in names in Sidetic (e.g. Poloniw for Apollonios, Thandor for Athenodoros), as is syncope (e.g. Artmon for Artemon).
Pandey, Anshuman. "Introducing the Sidetic Script" (PDF). Unicode Consortium. Retrieved 2021-04-12. https://www.unicode.org/L2/L2019/19106-sidetic-intro.pdf ↩
Bossert, H. T. (1950). "Scrittura e lingua di Side in Pamfilia". PDP. 13: 32–46. ↩
Hesychius says the Greek equivalent is τέττιξ, or cicada: Liddell, Henry George; Scott, Robert. "'Tettix', in: A Greek-English Lexicon". Perseus.Tufts. Retrieved 2021-05-02. http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0057:entry=te/ttic ↩
Nolle, Johannes (1983). "Die "Charaktere" im 3. Epidemienbuch des Hippokrates und Mnemon von Side". Epigraphica Anatolica. 2: 8.85–98. ↩
Pérez Orozco, Santiago. "La lengua Sidética. Una actualización [The Sidetic language. An update]". Retrieved 2021-11-13. (in Spanish) https://www.academia.edu/43814581 ↩
Woudhuizen, D. (2020). "On the Reading and Interpretation of the Two Longer Sidetic Inscriptions S I.2.1 and S I.2.5". Živa Antika. 70 (1/2): 17–34. doi:10.47054/ZIVA20701-2017w. S2CID 245576848. Retrieved 2021-11-13. https://www.academia.edu/45107430 ↩
Smith, William. "Mnemon (A Dictionary of Greek and Roman biography and mythology)". Perseus Tufts. Retrieved 2021-04-12. http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0104%3Aalphabetic+letter%3DM%3Aentry+group%3D28%3Aentry%3Dmnemon-bio-1 ↩
Nollé, Johannes (1983). "Die "Charaktere" im 3. Epidemienbuch des Hippokrates und Mnemon von Side". Epigraphica Anatolica. 1: 85–98. https://www.academia.edu/8335264 ↩
Rizza, Alfredo (2005). "A new epigraphic Document with Sidetic(?) signs". Kadmos. 44 (1–2): 60–74. doi:10.1515/KADM.2005.010. S2CID 162036788. /wiki/Doi_(identifier) ↩
Nollé (1983) p. 95. ↩
Michaela Zinko & Alfredo Rizza, based on 2025 research submitted to the Unicode Script Encoding Working Group to take into consideration for Unicode 17.0 ↩
Касьян, А.С. (Alexei S. Kassian) (January 2013). "Сидетский язык [The Sidetic language] (in: Языки Мира : Реликтовые индоевропейские языки Передней и Центральной Азии [Languages of the world : Relict Indo-European languages of Near- and Central-Asia], pp. 175-177)". Moskva Academia. Retrieved 2021-04-14. https://www.academia.edu/5541696 ↩