Reading some of the comments on StackExhange, I came across
this is irrelevant for this question
Shouldn't it be "irrelevant to this question"? Searching on Google I found both are used in various academic texts.
I prefer irrelevant to, but certainly accept irrelevant for:
However, when the complement is preposed, I prefer for over to:
—though note that to me in the last sentence means to my mind (To me, this is irrelevant doesn't seem to mean what This is irrelevant to me does)
Although, mostly, "irrelevant to" is the correct phrase, it is sometimes used interchangeably with "irrelevant for". I couldn't find many examples where "irrelevant for" has been used (and in these examples, "irrelevant for" can be conveniently replaced by "irrelevant to").