Pictish

Pictish was the language of the Picts, who held northern and eastern Scotland from Roman times through the early medieval period. It is the worst-attested language in this wing that scholars still argue was a real, distinct tongue rather than a label of convenience. No connected text in Pictish survives. What’s left is place names (the aber- and pit- elements scattered across the map of Scotland), personal names recorded by Irish, Anglo-Saxon and Scottish scribes writing in their own languages, and around forty Ogham-inscribed stones — most of which remain undeciphered. It is the only corpus of undeciphered inscriptions anywhere in the British Isles.

That gap in the evidence produced a real scholarly fight, not a settled footnote. For much of the 20th century, researchers including John Rhŷs and Kenneth Jackson argued Pictish carried a non-Indo-European substrate — an older language surviving under a thin Celtic veneer, unrelated to anything else in Britain. The theory leaned heavily on the failure to read the Ogham stones as Celtic. As Iron Age archaeology filled in a clearer picture of the north, that argument weakened, and most scholars today favor Pictish as a Brittonic (P-Celtic) language, a cousin of Welsh and Cumbric. But the stones haven’t gotten any more legible since Rhŷs’s day, and a 2020 reassessment of the five best-preserved Ogham inscriptions concluded that they still don’t read convincingly as Celtic — the language of the corpus, on that account, remains unidentified. The debate over what the Picts actually spoke has run for more than two hundred years and hasn’t fully closed.

The end is better documented than the beginning. After a Norse raid killed the leadership of both the Picts and their Gaelic-speaking neighbors in Dál Riata in 839, Kenneth MacAlpin became king of the Picts, and the two kingdoms began merging. By the reign of his grandson Caustantín mac Áeda, around 900, outsiders had stopped calling the place the Kingdom of the Picts and started calling it the Kingdom of Alba. The shift from Pictish to Gaelic wasn’t a conquest with a date on it — it was Gaelicisation, generation by generation, until by around the 11th century everyone in the old Pictish north was a Gaelic-speaking Scot, and Pictish identity itself had been forgotten. There is no last speaker on record, and nothing that leads anywhere: not a dialect, not a substrate detectable in modern Scots or Gaelic, nothing anyone can point to and say this is where Pictish still is. It simply stopped being spoken, inside a kingdom that had stopped calling itself Pictish.