Irrelevent, how?
See, now, this is just what I've been waiting for since the beginning of this thread. Our little friend here who cares so much about "correct" spelling and grammar has fouled up our beautiful language by using an absolutely incorrect spelling, ignorant of the etymology of the word.
It's "irrelevant". In all English varieties.
Mark
P.S.
That stuff I said about fouling up our beautiful language was a joke.