I haven't played this game in a while (due to the lack of a PS2, so I'm sure you can forgive me), but if I remember right, FF12 is full of "incorrect spellings".

I say "Tek-niks", though I know that they are exactly the same as Techniques, but are spelled and said differently to highlight the whole "It's a different world" thing (or that's why I think anyway). Kinda like the His Dark Materials words.