Téacschaint

Oh, now here's something!
Téacschaint -- http://wiki.anlionra.com/index.php/T%C3%A9acschaint
It's a short list, but interesting, mar shampla LOL (laughing out loud) = AGOA (ag gáire os ard), as seen in "catagoa," and BRB (be right back) = FGF (fan go fóill).
This is only part of the puzzle where catagoacha are concerned, but it's food for thought.