There's actually no such language as "Celtic". Celtic refers to a group of dozens of languages, six of which are spoken today:
In Irish it's "airgead"
In Irish it's "míorúilteach"
In Irish it's bheannaigh.
Ceilteach (adjective).
It's the other way around: Irish is a Celtic language.Here is a list of all 6 modern Celtic languages:Irish GaelicScottish GaelicManxWelshBretonCornish
Tá dúil mhór agam i Celtic Thunder.
In Irish it's "suaimhneas"
In Irish it's pian / crá
In Irish it's "stoirm an ghrá"
In Irish it's "álainn" In Welsh it's "hardd" In Scots Gaelic it's "bòidheach"
In Irish Gaelic, farm is "feirm" and in Scottish Gaelic, it is "feàrrm".
In Irish it's "Mac" (followed by the name in the genitive)