Wiktionary:About Lepontic

Lepontic is an Alpine Language, and a descendant of Proto-Celtic. It is under debate how closely it is related to Gaulish, but the most common thinking since Lejeune in 1971 (and reinforced by Koch in 2008) is that it should be considered a separate (yet heavily related, perhaps a sister or cousin, to Gaulish) Celtic language. It was probably the first language to diverge from Proto-Celtic.

Consonants

 * Labial voiceless plosives: p, pp
 * Labial voiceless fricatives: φ
 * Labial voiced plosives: β, bb
 * Labial voiced nasals: m, mm
 * Labial voiced approximants: u̯
 * Coronal voiceless plosives: t, tt
 * Coronal voiceless affricates: ts
 * Coronal voiceless fricatives: s
 * Coronal voiced plosives: δ, dd
 * Coronal voiced nasals: ŋ, nn
 * Coronal voiced trills: r, rr
 * Coronal voiced laterals: l, ll
 * Coronal voiced approximants: i̯
 * Dorsal voiceless plosives: k, kk
 * Dorsal voiceless fricatives: χ
 * Dorsal voiced plosives: γ, gg

Vowels
Short:


 * Front open: i
 * Front mid: e
 * Central low: a
 * Back open: u
 * Back mid: o

Long:


 * Front open: ī
 * Central low: ā
 * Back open: ū

Diphthongs
Short:


 * Front mid: ei̯
 * Central low: ai̯, au̯
 * Back mid: oi̯, ou̯

Long:


 * Central low: āi̯
 * Back open: ūi̯

Phonological developments
Vowel development from Proto-Celtic to Lepontic:

Declension
According to Lexicon Leponticum the known declension endings are: