How much did the ancient Romans understand the Gauls when Caesar set on his 9-year campaign? Would the language have appeared outlandish to Latin ears, like Basque is to us today, or on the contrary rather familiar like Romance and Germanic languages are to English speakers? Or maybe somewhere in between? Latin is an Italic tongue and as such shares a lot with Celtic languages, as the two only split from one another in the Late Bronze Age. Some linguists even classify Italic languages as a branch of Celtic. In any case 2000 years ago there were several Italic languages or dialects and many more varieties of Celtic. Chances are that Cisalpine Gaulish was more remote to Goidelic tongues of Ireland than to nearby Italic languages.
Without entering too much into details, I would like to concentrate here on basic everyday vocabulary that would have been mutually intelligible between Romans and Gauls. As there were various dialects of Gaulish sometimes two variants of the same word are mentioned.
Nouns
[TABLE="class: grid, width: 600"]
[TR]
[TD]Latin[/TD]
[TD]Gaulish[/TD]
[TD]English[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Equus[/TD]
[TD]Epos/ekwos[/TD]
[TD]War horse[/TD]
[/TR]
[TR]
[TD]Caballus[/TD]
[TD]Caballos[/TD]
[TD]Workhorse[/TD]
[/TR]
[TR]
[TD]Carrus[/TD]
[TD]Carros[/TD]
[TD]Wagon[/TD]
[/TR]
[TR]
[TD]Cassis[/TD]
[TD]Cassi[/TD]
[TD]Helmet[/TD]
[/TR]
[TR]
[TD]Gladius[/TD]
[TD]Gladios/cladios[/TD]
[TD]Sword[/TD]
[/TR]
[TR]
[TD]Lancea/hasta[/TD]
[TD]Lancia[/TD]
[TD]Spear/lance[/TD]
[/TR]
[TR]
[TD]Damnum[/TD]
[TD]Daunei[/TD]
[TD]Destruction, damage[/TD]
[/TR]
[TR]
[TD]Nomen, nomino[/TD]
[TD]Anuana[/TD]
[TD]Name[/TD]
[/TR]
[TR]
[TD]Tribus[/TD]
[TD]Trebo[/TD]
[TD]Tribe[/TD]
[/TR]
[TR]
[TD]Vir[/TD]
[TD]Uiro[/TD]
[TD]Man[/TD]
[/TR]
[TR]
[TD]Pater[/TD]
[TD]Ater[/TD]
[TD]Father[/TD]
[/TR]
[TR]
[TD]Mater[/TD]
[TD]Matir[/TD]
[TD]Mother[/TD]
[/TR]
[TR]
[TD]Rex[/TD]
[TD]Rix[/TD]
[TD]King[/TD]
[/TR]
[TR]
[TD]Regina[/TD]
[TD]Rigan[/TD]
[TD]Queen[/TD]
[/TR]
[TR]
[TD]Bucca[/TD]
[TD]Bocca[/TD]
[TD]Mouth[/TD]
[/TR]
[TR]
[TD]Deus[/TD]
[TD]Divos/devos[/TD]
[TD]God[/TD]
[/TR]
[TR]
[TD]Argentum[/TD]
[TD]Argento/arganton[/TD]
[TD]Silver[/TD]
[/TR]
[TR]
[TD]Stannum[/TD]
[TD]Stanno[/TD]
[TD]Tin[/TD]
[/TR]
[TR]
[TD]Canis[/TD]
[TD]Cunos[/TD]
[TD]Dog[/TD]
[/TR]
[TR]
[TD]Cattus[/TD]
[TD]Cattos[/TD]
[TD]Cat[/TD]
[/TR]
[TR]
[TD]Taurus[/TD]
[TD]Tarvos[/TD]
[TD]Bull[/TD]
[/TR]
[TR]
[TD]Sus, Porcus[/TD]
[TD]Succos, Porcom[/TD]
[TD]Pig[/TD]
[/TR]
[TR]
[TD]Capra[/TD]
[TD]Gabro(s)[/TD]
[TD]Goat[/TD]
[/TR]
[TR]
[TD]Betulla[/TD]
[TD]Betulla[/TD]
[TD]Birch[/TD]
[/TR]
[TR]
[TD]Mare[/TD]
[TD]Mori[/TD]
[TD]Sea[/TD]
[/TR]
[TR]
[TD]Dies[/TD]
[TD]Dios[/TD]
[TD]Day[/TD]
[/TR]
[TR]
[TD]Nox[/TD]
[TD]Nox, noux[/TD]
[TD]Night[/TD]
[/TR]
[TR]
[TD]Unus[/TD]
[TD]Oino[/TD]
[TD]One[/TD]
[/TR]
[TR]
[TD]Duo[/TD]
[TD]Duo[/TD]
[TD]Two[/TD]
[/TR]
[TR]
[TD]Tres[/TD]
[TD]Treis/tri/tidres[/TD]
[TD]Three[/TD]
[/TR]
[TR]
[TD]Quattuor[/TD]
[TD]Petuar/petro/petru[/TD]
[TD]Four[/TD]
[/TR]
[TR]
[TD]Quinque[/TD]
[TD]Pempe/pimpe[/TD]
[TD]Five[/TD]
[/TR]
[TR]
[TD]Sex[/TD]
[TD]Suexs[/TD]
[TD]Six[/TD]
[/TR]
[TR]
[TD]Septem[/TD]
[TD]Sextan[/TD]
[TD]Seven[/TD]
[/TR]
[TR]
[TD]Octo[/TD]
[TD]Octu/oxtu[/TD]
[TD]Eight[/TD]
[/TR]
[TR]
[TD]Novem[/TD]
[TD]Nauan[/TD]
[TD]Nine[/TD]
[/TR]
[TR]
[TD]Decem[/TD]
[TD]Decan/decam[/TD]
[TD]Ten[/TD]
[/TR]
[TR]
[TD]Centum[/TD]
[TD]Canto/Conto[/TD]
[TD]Hundred[/TD]
[/TR]
[/TABLE]
Adjectives/adverbs/conjunctions
[TABLE="class: grid, width: 600"]
[TR]
[TD]Latin[/TD]
[TD]Gaulish[/TD]
[TD]English[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Et[/TD]
[TD]Etic[/TD]
[TD]And[/TD]
[/TR]
[TR]
[TD]Ex[/TD]
[TD]Es[/TD]
[TD]Out(side)[/TD]
[/TR]
[TR]
[TD]Intra, intus[/TD]
[TD]Entara[/TD]
[TD]Inside[/TD]
[/TR]
[TR]
[TD]Itum, Item, Idem, Etiam[/TD]
[TD]Eti[/TD]
[TD]Also, too[/TD]
[/TR]
[TR]
[TD]Ita, sic[/TD]
[TD]Isoc[/TD]
[TD]Like, as[/TD]
[/TR]
[TR]
[TD]Nunc[/TD]
[TD]Nu[/TD]
[TD]Now[/TD]
[/TR]
[TR]
[TD]Novus[/TD]
[TD]Novio[/TD]
[TD]New[/TD]
[/TR]
[TR]
[TD]Senex[/TD]
[TD]Seno[/TD]
[TD]Old[/TD]
[/TR]
[TR]
[TD]Magnus[/TD]
[TD]Maros[/TD]
[TD]Big, large[/TD]
[/TR]
[TR]
[TD]Medius, Medium[/TD]
[TD]Medio[/TD]
[TD]Middle[/TD]
[/TR]
[TR]
[TD]Rectus[/TD]
[TD]Cert (c & r inversion)[/TD]
[TD]Right[/TD]
[/TR]
[TR]
[TD]Rutilus, Cocus[/TD]
[TD]Rud, cocos[/TD]
[TD]Red[/TD]
[/TR]
[/TABLE]
Verbs
[TABLE="class: grid, width: 600"]
[TR]
[TD]Latin[/TD]
[TD]Gaulish[/TD]
[TD]English[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Battuere[/TD]
[TD]Bat-[/TD]
[TD]Beat, hit[/TD]
[/TR]
[TR]
[TD]Bibere[/TD]
[TD]Ibere[/TD]
[TD]Drink[/TD]
[/TR]
[TR]
[TD]Cantare[/TD]
[TD]Cantare[/TD]
[TD]Sing[/TD]
[/TR]
[TR]
[TD]Cambi(a)re[/TD]
[TD]Cambiare[/TD]
[TD]Ex(change)[/TD]
[/TR]
[TR]
[TD]Dare[/TD]
[TD]Dere[/TD]
[TD]Give[/TD]
[/TR]
[TR]
[TD]Gnatus, Genitus[/TD]
[TD]Gnatos, Genos[/TD]
[TD]Born[/TD]
[/TR]
[TR]
[TD]Legare[/TD]
[TD]Legare[/TD]
[TD]Bequeth, offer[/TD]
[/TR]
[TR]
[TD]Sedere[/TD]
[TD]Sedere[/TD]
[TD]Sit[/TD]
[/TR]
[TR]
[TD]Venire[/TD]
[TD]Benire[/TD]
[TD]Come[/TD]
[/TR]
[TR]
[TD]Vertere[/TD]
[TD]Vertere/vartere/vortere[/TD]
[TD]Turn[/TD]
[/TR]
[/TABLE]
Note that many words are identical appart from the -us ending becoming -os in Gaulish. But since both languages use similar declensions, these ending would have changed depending on their function in a sentence anyway, so that for a singular masculine word in -us, it would have become -um (Latin) -on (Gaulish) in the accusative, -i (for both) in the genitive and -ō (Latin) -u (Gaulish) in the dative. The similarity of grammar would have made it easy to learn each others language.
Without entering too much into details, I would like to concentrate here on basic everyday vocabulary that would have been mutually intelligible between Romans and Gauls. As there were various dialects of Gaulish sometimes two variants of the same word are mentioned.
Nouns
[TABLE="class: grid, width: 600"]
[TR]
[TD]Latin[/TD]
[TD]Gaulish[/TD]
[TD]English[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Equus[/TD]
[TD]Epos/ekwos[/TD]
[TD]War horse[/TD]
[/TR]
[TR]
[TD]Caballus[/TD]
[TD]Caballos[/TD]
[TD]Workhorse[/TD]
[/TR]
[TR]
[TD]Carrus[/TD]
[TD]Carros[/TD]
[TD]Wagon[/TD]
[/TR]
[TR]
[TD]Cassis[/TD]
[TD]Cassi[/TD]
[TD]Helmet[/TD]
[/TR]
[TR]
[TD]Gladius[/TD]
[TD]Gladios/cladios[/TD]
[TD]Sword[/TD]
[/TR]
[TR]
[TD]Lancea/hasta[/TD]
[TD]Lancia[/TD]
[TD]Spear/lance[/TD]
[/TR]
[TR]
[TD]Damnum[/TD]
[TD]Daunei[/TD]
[TD]Destruction, damage[/TD]
[/TR]
[TR]
[TD]Nomen, nomino[/TD]
[TD]Anuana[/TD]
[TD]Name[/TD]
[/TR]
[TR]
[TD]Tribus[/TD]
[TD]Trebo[/TD]
[TD]Tribe[/TD]
[/TR]
[TR]
[TD]Vir[/TD]
[TD]Uiro[/TD]
[TD]Man[/TD]
[/TR]
[TR]
[TD]Pater[/TD]
[TD]Ater[/TD]
[TD]Father[/TD]
[/TR]
[TR]
[TD]Mater[/TD]
[TD]Matir[/TD]
[TD]Mother[/TD]
[/TR]
[TR]
[TD]Rex[/TD]
[TD]Rix[/TD]
[TD]King[/TD]
[/TR]
[TR]
[TD]Regina[/TD]
[TD]Rigan[/TD]
[TD]Queen[/TD]
[/TR]
[TR]
[TD]Bucca[/TD]
[TD]Bocca[/TD]
[TD]Mouth[/TD]
[/TR]
[TR]
[TD]Deus[/TD]
[TD]Divos/devos[/TD]
[TD]God[/TD]
[/TR]
[TR]
[TD]Argentum[/TD]
[TD]Argento/arganton[/TD]
[TD]Silver[/TD]
[/TR]
[TR]
[TD]Stannum[/TD]
[TD]Stanno[/TD]
[TD]Tin[/TD]
[/TR]
[TR]
[TD]Canis[/TD]
[TD]Cunos[/TD]
[TD]Dog[/TD]
[/TR]
[TR]
[TD]Cattus[/TD]
[TD]Cattos[/TD]
[TD]Cat[/TD]
[/TR]
[TR]
[TD]Taurus[/TD]
[TD]Tarvos[/TD]
[TD]Bull[/TD]
[/TR]
[TR]
[TD]Sus, Porcus[/TD]
[TD]Succos, Porcom[/TD]
[TD]Pig[/TD]
[/TR]
[TR]
[TD]Capra[/TD]
[TD]Gabro(s)[/TD]
[TD]Goat[/TD]
[/TR]
[TR]
[TD]Betulla[/TD]
[TD]Betulla[/TD]
[TD]Birch[/TD]
[/TR]
[TR]
[TD]Mare[/TD]
[TD]Mori[/TD]
[TD]Sea[/TD]
[/TR]
[TR]
[TD]Dies[/TD]
[TD]Dios[/TD]
[TD]Day[/TD]
[/TR]
[TR]
[TD]Nox[/TD]
[TD]Nox, noux[/TD]
[TD]Night[/TD]
[/TR]
[TR]
[TD]Unus[/TD]
[TD]Oino[/TD]
[TD]One[/TD]
[/TR]
[TR]
[TD]Duo[/TD]
[TD]Duo[/TD]
[TD]Two[/TD]
[/TR]
[TR]
[TD]Tres[/TD]
[TD]Treis/tri/tidres[/TD]
[TD]Three[/TD]
[/TR]
[TR]
[TD]Quattuor[/TD]
[TD]Petuar/petro/petru[/TD]
[TD]Four[/TD]
[/TR]
[TR]
[TD]Quinque[/TD]
[TD]Pempe/pimpe[/TD]
[TD]Five[/TD]
[/TR]
[TR]
[TD]Sex[/TD]
[TD]Suexs[/TD]
[TD]Six[/TD]
[/TR]
[TR]
[TD]Septem[/TD]
[TD]Sextan[/TD]
[TD]Seven[/TD]
[/TR]
[TR]
[TD]Octo[/TD]
[TD]Octu/oxtu[/TD]
[TD]Eight[/TD]
[/TR]
[TR]
[TD]Novem[/TD]
[TD]Nauan[/TD]
[TD]Nine[/TD]
[/TR]
[TR]
[TD]Decem[/TD]
[TD]Decan/decam[/TD]
[TD]Ten[/TD]
[/TR]
[TR]
[TD]Centum[/TD]
[TD]Canto/Conto[/TD]
[TD]Hundred[/TD]
[/TR]
[/TABLE]
Adjectives/adverbs/conjunctions
[TABLE="class: grid, width: 600"]
[TR]
[TD]Latin[/TD]
[TD]Gaulish[/TD]
[TD]English[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Et[/TD]
[TD]Etic[/TD]
[TD]And[/TD]
[/TR]
[TR]
[TD]Ex[/TD]
[TD]Es[/TD]
[TD]Out(side)[/TD]
[/TR]
[TR]
[TD]Intra, intus[/TD]
[TD]Entara[/TD]
[TD]Inside[/TD]
[/TR]
[TR]
[TD]Itum, Item, Idem, Etiam[/TD]
[TD]Eti[/TD]
[TD]Also, too[/TD]
[/TR]
[TR]
[TD]Ita, sic[/TD]
[TD]Isoc[/TD]
[TD]Like, as[/TD]
[/TR]
[TR]
[TD]Nunc[/TD]
[TD]Nu[/TD]
[TD]Now[/TD]
[/TR]
[TR]
[TD]Novus[/TD]
[TD]Novio[/TD]
[TD]New[/TD]
[/TR]
[TR]
[TD]Senex[/TD]
[TD]Seno[/TD]
[TD]Old[/TD]
[/TR]
[TR]
[TD]Magnus[/TD]
[TD]Maros[/TD]
[TD]Big, large[/TD]
[/TR]
[TR]
[TD]Medius, Medium[/TD]
[TD]Medio[/TD]
[TD]Middle[/TD]
[/TR]
[TR]
[TD]Rectus[/TD]
[TD]Cert (c & r inversion)[/TD]
[TD]Right[/TD]
[/TR]
[TR]
[TD]Rutilus, Cocus[/TD]
[TD]Rud, cocos[/TD]
[TD]Red[/TD]
[/TR]
[/TABLE]
Verbs
[TABLE="class: grid, width: 600"]
[TR]
[TD]Latin[/TD]
[TD]Gaulish[/TD]
[TD]English[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Battuere[/TD]
[TD]Bat-[/TD]
[TD]Beat, hit[/TD]
[/TR]
[TR]
[TD]Bibere[/TD]
[TD]Ibere[/TD]
[TD]Drink[/TD]
[/TR]
[TR]
[TD]Cantare[/TD]
[TD]Cantare[/TD]
[TD]Sing[/TD]
[/TR]
[TR]
[TD]Cambi(a)re[/TD]
[TD]Cambiare[/TD]
[TD]Ex(change)[/TD]
[/TR]
[TR]
[TD]Dare[/TD]
[TD]Dere[/TD]
[TD]Give[/TD]
[/TR]
[TR]
[TD]Gnatus, Genitus[/TD]
[TD]Gnatos, Genos[/TD]
[TD]Born[/TD]
[/TR]
[TR]
[TD]Legare[/TD]
[TD]Legare[/TD]
[TD]Bequeth, offer[/TD]
[/TR]
[TR]
[TD]Sedere[/TD]
[TD]Sedere[/TD]
[TD]Sit[/TD]
[/TR]
[TR]
[TD]Venire[/TD]
[TD]Benire[/TD]
[TD]Come[/TD]
[/TR]
[TR]
[TD]Vertere[/TD]
[TD]Vertere/vartere/vortere[/TD]
[TD]Turn[/TD]
[/TR]
[/TABLE]
Note that many words are identical appart from the -us ending becoming -os in Gaulish. But since both languages use similar declensions, these ending would have changed depending on their function in a sentence anyway, so that for a singular masculine word in -us, it would have become -um (Latin) -on (Gaulish) in the accusative, -i (for both) in the genitive and -ō (Latin) -u (Gaulish) in the dative. The similarity of grammar would have made it easy to learn each others language.
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