The word féile means a saint's day and now seems to mean any kind of festival, but there's fleadh - is this only used for a music festival or is it interchangeable with féile? - and then there's feasta, which I imagine comes from feast/fête - but for me, would also mean a saint's day. I feel as if I'm going round in circles on this one.
(PS Bonne Année à tout le monde)
Franc

Fleadh is a feast, especially a drinking feast; fleadh cheoil a music festival. Feasta is an adverb meaning from now on, henceforth. Féasta is a feast or banquet, more a meal than a feast day

Ah, sorry I forgot to put the fada there - so how would you translate the word - festival ?

Feis.

(Or féile … or fleá/fleadh. Depends on what kind of festival it is.)

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Not a native speaker.

Always wait for at least three people to agree on a translation, especially if it’s for something permanent.

My translations are usually GU (Ulster Irish), unless CO (Standard Orthography) is requested.