I fell in love with Irish traditional music when I was 13 (that was...er...a few years ago). When I love something, I immerse myself in it completely. You can't really separate traditional music from the culture that gave rise to it -- its history, its lore, its traditions, its literature, and yes...its language. Not and do it justice.
For me, it never was satisfactory to learn Irish song knowing only the translations (which, as we know, are often shaky anyway)...if I were to do it justice, I needed to feel and understand it at the cultural and linguistic level.
I actually tried to teach myself Irish from an old Conradh na Gaeilge pamphlet when I was 15 (which was little more than a bunch of sentences written in seanchló, with incomprehensible pronunciation notes). As you can imagine, that didn't work very well, though I do remember the first sentence I actually said aloud from that pamphlet: "Bhuail an fear an asal inné."
Redwolf