Lepontic is an ancient Alpine Celtic language that was spoken in parts of Rhaetia and Cisalpine Gaul (now Northern Italy) between 550 and 100 BC. It is found in writings discovered in an area centered on Lugano, Switzerland, and including the Lake Como and Lake Maggiore regions of Italy. Its name might come from Proto-Celtic *leikʷontio- (the same root used for Lepontina, which became the modern (Val) Leventina).

Some recent studies, such as those by Eska in 1998, suggest that Lepontic was an early form of Gaulish and closely related to later Gaulish writings in Italy (Cisalpine Gaulish). However, other scholars, like Lejeune in 1971, believe Lepontic was a separate Continental Celtic language. In this view, writings found within 50 kilometers of Lugano are considered Lepontic, while those slightly farther south are classified as Cisalpine Gaulish.

Lepontic was replaced first by Gaulish, as Gallic tribes settled north of the River Po, and later by Latin, after the Roman Republic gained control of Gallia Cisalpina during the late second and first centuries BC.

Classification

Some scholars believe Lepontic is a separate language within the Continental Celtic group. Others think it is an early form of Cisalpine Gaulish (or Cisalpine Celtic) and therefore a dialect of Gaulish.

In the past, especially during most of the 20th century and until about 1970, many scholars considered Lepontic a "para-Celtic" western Indo-European language. This means it was seen as related to, but not part of, the Celtic language family, and possibly connected to Ligurian. However, Ligurian itself has been viewed as similar to, but not descended from, Common Celtic.

Schumacher, based on linguistic and archaeological evidence, suggests that Lepontic might be a main branch of the Celtic language family, possibly the first to split off from Proto-Celtic. Regardless of these views, the Lepontic inscriptions are the earliest known written records of any Celtic language. Because there are very few of these inscriptions, it is unlikely that debates about how to classify Lepontic within the Celtic family will be fully resolved soon unless more significant discoveries are made.

Alphabet

The alphabet used in Lugano, based on writings found in northern Italy and the Canton Ticino region, was used to write Lepontic inscriptions. These inscriptions are among the oldest records of a Celtic language, dating from the 7th to the 5th centuries BC. This alphabet has 18 letters, which were adapted from the old Etruscan alphabet.

The alphabet does not separate sounds made by stopping the airflow in the mouth, such as P, which can represent /b/ or /p/; T, which can represent /t/ or /d/; and K, which can represent /g/ or /k/. The letter Z is likely used for /t/. The letters U and V represent /u/ and /w/, respectively. The symbol Θ is likely for /t/, and X is likely for /g/. Some people believe a similar writing system was found in Glozel.

Corpus

Lepontic is known from about 140 inscriptions written in the alphabet of Lugano, one of five main Northern Italic alphabets based on the Etruscan alphabet. Similar scripts were used for writing the Rhaetic and Venetic languages. The Germanic runic alphabets may have come from a script related to this group.

Scholars disagree about whether all inscriptions in the Lugano alphabet belong to a single language. In ancient times, it was common for one alphabet to be used for multiple languages. The Lugano alphabet was also used on coins made by other Alpine tribes, such as the Salassi, Salluvii, and Cavares.

Many later inscriptions are usually identified as Cisalpine Gaulish, but older inscriptions are often linked to a language different from Gaulish, called Lepontic. Before 1971, Lepontic was thought to be pre-Celtic, possibly related to Ligurian. However, Lejeune argued it should be classified as a Celtic language, similar to Celtiberian but distinct from Cisalpine Gaulish. This view is now widely accepted. Some scholars, however, consider Lepontic an early or local form of Cisalpine Gaulish. The geographic spread of inscriptions supports a distinction, as Cisalpine Gaulish texts are later and found further south, while earlier Lepontic material shows both similarities and differences.

The language is named after the Lepontii, who lived in parts of ancient Rhaetia, an area between modern Switzerland and Italy, near Cisalpine Gaul. Some scholars, like Joseph F. Eska, use the term "Lepontic" for all Celtic dialects in ancient Italy. Others argue the Lepontii were an indigenous Alpine group, separate from the Gauls who later settled northern Italy.

The earliest Lepontic inscriptions date to before the 5th century BC. Examples from Castelletto Ticino are from the 6th century BC, and some from Sesto Calende may be as old as the 7th century BC. These inscriptions are often linked to the Golasecca culture, a Celtic cultural area in northern Italy. Lepontic likely disappeared because no later inscriptions exist.

Most Lepontic inscriptions are short, often listing only the name of the deceased, with or without the word "pala" (meaning "tomb stone"). Two longer examples include:

Probably: "Uenia Metel-ikna and Aśmina Krasan-ikna dedicate this vase to Metelos Maeśelalos."

Probably: "Iśos dedicated (or sealed) this sacred pruiam (tomb?) and erected this stone for Pelkos."

The verb forms "karite" and "kalite" suggest a -t- ending for past tense, also seen in Gaulish. These may be two verbs meaning "call (for); command, order" (from Proto-Celtic kalyo- and galwo-). Alternatively, "karite" could be related to Gaulish "karnite" (meaning "erected, constructed"), with connections to Old Irish "carn" (a tomb or stone heap) and the place name "Carnuntum."

Probably: "[This] Naxian wine is dedicated to Latumaros and Sapsuta."

This inscription includes the "P-Celtic" form of the Proto-Indo-European word -ke, shown as "-pe" here.

Based on inscriptions and archaeological evidence, this text dates to about 480–450 BC.

Probably: "Uvamakozis gave these uvltiaviop-s and arivonep-s to Plialethos and sits (possibly 'sacred mounds')."

The name "Uvamokozis" likely comes from Proto-Indo-European up-mmo-gostis ("having most esteemed guests"), evolving through Proto-Celtic gostis and related to Old Church Slavonic "gostъ" and Gothic "gasts." The change of p to v in this name is important for understanding sound development in Celtic.

The word "sitis" probably comes from Proto-Indo-European sēdns ("seats"), an accusative plural. This connects to Old Irish "sid" ("sacred mound") and Latin "sēdēs."

The word "tetu" likely comes from Proto-Indo-European deh3- ("give"), seen in Old Irish "dorat" ("has given"), Gaulish "dede," and Celt-Iberian "tatuz" on the first Botorrita plaque.