As Reception and Legacy showed, Jones’s intuition was forged by Bopp, Rask, and Grimm into a testable rule. But what became of the individual predictions Jones actually made? This article takes his claims about language one at a time and checks what more than two centuries of linguistics has concluded about each.
The core three — confirmed
The central claim — that Sanskrit, Greek, and Latin share a common ancestor — has been checked and rechecked by comparative linguistics ever since, and it has held. All three sit within the Indo-European family, in its Indo-Iranian, Hellenic, and Italic branches respectively. The evidence Jones relied on — matching verb roots and grammatical forms — was later backed up by concrete, checkable rules of regular sound correspondence, Grimm’s Law chief among them.
Gothic and Celtic — confirmed, though Celtic took a detour
The prediction that Gothic (Germanic) belongs to this family is also confirmed. Celtic was confirmed too, eventually, though its path there had a wrinkle. In the early nineteenth century, whether Celtic even belonged to the Indo-European family was genuinely disputed among linguists — its vocabulary and grammar looked, on the surface, quite different from the rest of the family. It wasn’t settled until the 1830s and 1840s, when scholars including Franz Bopp himself carefully checked Celtic’s internal structure using the comparative method. Jones’s intuition — “probably the same origin” — turned out to be right, but it took more than half a century after his prediction to actually prove it.
Old Persian — confirmed
Old Persian is also confirmed as a member of the Indo-Iranian branch. What pushed this confirmation through was progress in an entirely different field — in the early nineteenth century, scholars including Georg Friedrich Grotefend deciphered Persian cuneiform, making the actual substance of Old Persian legible for the first time. Details of the language Jones couldn’t fully have known at the time of his address were backed up through an independent route: the decipherment of a script.
Chinese and Tibetan — right, but thinly supported
What about the correspondence noted in the overview article, between the sound patterns of Chinese and Tibetan? Modern linguistics widely accepts a grouping of Sinitic languages together with Tibeto-Burman languages as a “Sino-Tibetan” family — in that sense, Jones’s intuition was right here too. But what actually established this family wasn’t the evidence Jones cited (the “order of sounds”); it was the systematic comparison of core vocabulary and morphology that later researchers built up. A correct prediction, but one his own argument supported far less solidly than the case of Sanskrit, Greek, and Latin.
The common origin of scripts — rejected
As the previous article showed, the claim that Nagari, Chaldean (Hebrew), Arabic, and Phoenician letters all derive from the same prototype finds no support in modern paleography. Here Jones was leaning not on the concrete evidence he used for language — verb roots, grammatical form — but on a much weaker kind of evidence: resemblance in the shape of the letters.
What made the difference
Lined up this way, a clear pattern emerges. Predictions backed by concrete, checkable evidence — verb roots, grammatical form, and later regular sound correspondence — held up under scrutiny. Predictions resting on nothing more than impression or surface resemblance — the shape of letters, and the mythological and religious correspondences covered in the previous article — sometimes turned out right, but more by coincidence than by anything resembling verification. Jones’s own methodological lesson from the language argument — pay attention to the layer that borrowing can’t reach — is confirmed, ironically enough, most clearly in the very places where he himself failed to follow it.
Summary
| Prediction | Modern verdict | What settled it |
|---|---|---|
| Sanskrit, Greek, Latin | Confirmed | Verb roots, grammatical form, later regular sound correspondence |
| Gothic (Germanic) | Confirmed | Same as above |
| Celtic | Confirmed (proof came 50+ years later) | Internal verification via the comparative method, 1830s–40s |
| Old Persian | Confirmed | Decipherment of cuneiform (early 19th c.) |
| Chinese-Tibetan correspondence | Partially supported | Later comparison of core vocabulary and morphology (not Jones’s own evidence) |
| Common origin of scripts | Rejected | Modern paleographic classification |
In a nutshell — one writer, in one address, made predictions that met wildly different fates. What separated them wasn’t the sharpness of the intuition itself, but how much checkable evidence backed it up.