The Indus script, found on thousands of seals, pottery, and tablets from the Harappan civilization, remains undeciphered despite over a century of effort. The nature of the script (logographic or syllabic) and the underlying language are subjects of intense debate.

Characteristics of the Script

  • Found on approximately 4,000 objects, mostly steatite seals and pottery
  • Contains around 400–600 distinct signs (depending on classification)
  • Average inscription length is 4–5 signs; the longest is 26 signs
  • Usually written right-to-left
  • Often accompanied by animal motifs (unicorn, bull, elephant, tiger)

Major Decipherment Claims

Dravidian Hypothesis

Asko Parpola, Iravatham Mahadevan, and others argue the Indus language is Dravidian. They identify Dravidian roots in Indus signs and compare the script to early Dravidian writing systems. Michel Danino’s critique in the corpus highlights methodological flaws in this approach, including hasty conflations of script, language, and culture.

Vedic/Sanskrit Hypothesis

S. Kalyanaraman and others argue the Indus language is Vedic Sanskrit, reading seals as metalwork catalogs or Vedic metaphors. C.P. Trivedi interprets seals through Vedic scientific concepts, finding descriptions of DNA, atomic structure, and thermodynamics.

Austroasiatic Hypothesis

Some scholars propose an Austroasiatic (Munda) substratum for the Indus language, based on agricultural vocabulary and the distribution of Austroasiatic languages in India.

Other Hypotheses

  • Sumerian/Turkic connections
  • Sino-Tibetan affiliations
  • The “multilingual” hypothesis (trade language with elements from multiple families)

Methodological Issues

  • Lack of a bilingual text: Unlike Egyptian hieroglyphs or Linear B, no Rosetta Stone exists for Indus
  • Short inscriptions: The brevity of texts limits contextual analysis
  • Sign variability: Differences across sites and periods complicate sign identification
  • Direction of writing: Right-to-left is agreed, but boustrophedon patterns also occur

Key Sources in the Corpus

  • Michel Danino: Rigorous critique of the Dravido-Harappan equation from a methodological standpoint
  • S. Kalyanaraman: Comprehensive Vedic reading of Indus seals as metalwork catalogs
  • C.P. Trivedi: Reading Indus seals through Vedic science
  • Multiple papers: Rigvedic and written Mature Harappan connections, electromicroscopy studies