language

*Lingua*, in the Latin sense, was never merely the organ of speech — it was the instrument of *differentia*, the thing that distinguishes one community from another.‍​‌​‌​‍​‌​‌​‌​‍​‍​‍​‍​‌​‍​‍​‍​‍​‍​‍​‍​‌​‌​‍​‌​‍​‍​‍​‍​‌​‍​‍​‍​‌ The English word language descends from Old French *langage*, itself from *langue* (tongue, language), from Latin *lingua* (tongue, speech, language). The form *lingua* is itself a contraction of the older Latin *dingua*, attested in archaic inscriptions, which connects directly to the Proto-Indo-European root *\*dn̥ǵʰwéh₂s* (tongue), from the base *\*dénǵʰ-* (to lick, to taste, perhaps to speak).

The reconstruction *\*dn̥ǵʰwéh₂s* is among the more securely attested PIE forms, given its reflexes across virtually every branch of the family. The initial dental *d-* underwent regular sound change in Latin — the shift from *d* to *l* before *n* is well-documented in the transition from *dingua* to *lingua*, reflecting a process of dissimilation. This is not unique to Latin: similar changes operate across the Romance languages, but the Latin form already shows the outcome, making the etymology appear opaque until one reconstructs the archaic spelling.

The root *\*dénǵʰ-* is cognate with Sanskrit *jihvā* (tongue), Old Irish *tengae* (tongue), Gothic *tuggō* (tongue), Old English *tunge* (tongue — the direct ancestor of modern English *tongue*), Lithuanian *liežuvis*, and Armenian *lezu*. These forms collectively testify to the widespread use of the physical tongue as a metonym for the entire system of speech — a conceptual move that preceded written history.

The Latin *lingua* entered Vulgar Latin and then Old French as *langue* by the 10th century, where it carried dual meaning: the physical tongue and the system of speech shared by a community. The derived form *langage* (attested in Old French from approximately the 12th century) carried the sense of the collective phenomenon — not merely one person's tongue but the institution shared by speakers.

Middle English borrowed *langage* directly from Old French, attested from around 1290 in texts such as those of Robert of Gloucester. By the late 14th century, Chaucer uses *language* in a form recognizably modern, meaning both a specific tongue (French, Latin, English) and the general capacity for speech. The sense gradually broadened: by the 16th century, *language* could refer to any system of signs, including gesture, music, or visual symbol — a broadening that anticipates the structuralist position by several centuries.

What the English word *language* obscures is a distinction that French preserves: *langue* versus *parole*. *Langue* is the social, systemic, abstract institution — the code held collectively by a speech community. *Parole* is the individual act of speech, the concrete utterance. English collapses both into *language*, which forces speakers to rely on context to distinguish what is systematic from what is instantial. German handles this more precisely still, with *Sprache* (language as system or faculty) and *Rede* (speech, discourse) available as distinct terms.

This terminological collapse in English is itself a linguistic fact of interest: the word *language* performs a kind of syncretism, holding together reference to both the abstract system and its concrete realisation. When we say 'the English language,' we mean something closer to *langue*; when we say 'diplomatic language,' we approach *parole* or at least register. The word carries both without marking the difference.

Because *\*dn̥ǵʰwéh₂s* generated words meaning *tongue* across so many branches, the cognate network of *language* is in fact a cognate network of *tongue* words. English *tongue* (Old English *tunge*) and English *language* are distant relatives by this path — two different reflexes of the same PIE root, one inherited through Germanic, one borrowed through Romance from Latin. Speakers of English use both daily without awareness of this kinship.

Also related, through the *dénǵʰ-* base, are words in the Baltic languages for tongue, and the Armenian form *lezu*. The Greek word for tongue, *glōssa* (also *glōtta*), is disputed — it may reflect a different root, or it may be a very early derivative with palatalization. This uncertainty is notable given how central Greek is to the history of linguistic thinking.

The movement from *body part* to *social institution* is not arbitrary. Across many language families, the organ of speech becomes a term for the faculty or system of speech — mouth, tongue, voice, lip all generate words for language in various traditions. The tongue was the most visible and controllable articulator, making it the most natural metonym for deliberate communication.

In medieval Latin, *lingua* carried heavy cultural weight: to know Latin was to participate in a universal *lingua*, a written standard that transcended regional *vernaculae*. The emergence of vernacular literatures in the 12th and 13th centuries was partly framed as the legitimisation of local *linguae* — of French, Italian, Provençal — against the prestige of the universal tongue. Dante's *De vulgari eloquentia* (c. 1302) uses *lingua* throughout in this sense of a specific community's speech system.

Modern use of *language* has extended far beyond speech: programming languages, body language, the language of flowers, the language of film. Each extension assumes the core structural meaning — a system of signs with rules of combination — while detaching from the biological substrate. This trajectory mirrors the structuralist insight: what matters is the system of differences, not the particular medium in which it is realised. The word *language* has, in its own semantic history, enacted exactly the abstraction that linguistics as a discipline required: a move from organ to system, from body to structure.