Scythian was an Eastern Iranian language, kin to Sogdian and Bactrian. The corpus is thin: Herodotus's glosses, royal and tribal names in Greek and Assyrian texts, and place names across the steppe. Modern Ossetian, spoken in the Caucasus and descended from the Scythians' Sarmatian-Alan cousins, anchors the reconstruction.
Nationalist grammars from several modern nations claim Scythian as direct ancestor, Persian, Slavic, Turkic, and Caucasian traditions all bid. Linguistics keeps awarding the contract to the Iranian branch and the arguments keep reappearing in every election season.
What the glosses preserve is texture: oros, great, in royal names; spu, dog, hidden in the tribe Sparapetes. The steppe that left no literature left fingerprints in other people's alphabets, a language audible only as interference patterns in Greek.
Can you know a people who never wrote, through the spelling of those who fought them?