There is no such language as Celtic. The word "Celtic" refers to a group of more than a dozen different languages, 6 of which are still spoken today:
Irish Gaelic
Scottish Gaelic
Welsh
Breton
Manx
Cornish
In Irish it's: tine (controlled fire) / dóiteán (blaze)
"Fire" in English is api in Indonesian, eldur in Icelandic, lua in Vietnamese and tine in Irish Gaelic.
Modern Irish - tine; Old Irish - teine Scottish Gaelic - teine Manx - aile The name Áed is another word for 'fire'. Delbaeth means 'fire shape'.
In Irish it's "an Fómhar" In Scots Gaelic it's "am Foghar"
Aodhnait (eenit)
In Irish it's "bean na tine"
In Irish d'fhíorghrá;in Scottish Gaelic: ?
No Irish Gaelic form
In Irish it's "A Aodhán, mo lasóg"
The Gaelic word for "spitfire" is "tine cnámh" in Scottish Gaelic and "tine cnámh" in Irish Gaelic. The term "tine" translates to "fire" and "cnámh" translates to "spit" in English. This compound word captures the essence of a fiery, passionate individual.
Gaelic football is an Irish football. Gaelic means Irish. Obviously then the Gaelic our Irish people
The Irish Gaelic for 'turbine' is TUIRBÍN; the Scottish Gaelic is TUIRBIN.
In Irish Gaelic the word for chilli is CILLÍ.