There is no single language called 'Celtic'. It's like saying 'Slavic' or 'Germanic'.
It's a family of related languages.
Irish (Gaelic): Eilís or Sibéal
Scottish Gaelic: Ealasaid or Iseabail
Welsh: Elisabeth (Bethan) or Ysbail
Breton: Izabell
Irish: Éilis
Irish Gaelic is Eilís [eleesh];Scottish Gaelic: Ealasaid [ella-setch]
Irish (Gaelic): Eilís [eleesh] (Scots) Gaelic: Ealasaid Manx/Welsh/Breton/Cornish: ?
In Irish d'fhíorghrá;in Scottish Gaelic: ?
No Irish Gaelic form
Gaelic football is an Irish football. Gaelic means Irish. Obviously then the Gaelic our Irish people
In Irish Gaelic the word for chilli is CILLÍ.
The Irish Gaelic for 'turbine' is TUIRBÍN; the Scottish Gaelic is TUIRBIN.
Irish Gaelic for 'trees' is 'crainn'.
No Irish Gaelic version.
In Irish Gaelic: saoirse
'Thin' is tanaí in Irish Gaelic.