Diference between "bukan" and "tidak"?
I think "bukan" means "not" and "tidak" means no.
Why is the k not pronounced?
The correct one should have K sound, but soft K or soundless K is ok too
That's not exactly true. In Indonesian, words or syllables that end with a k have a glottal stop. You basically almost start to say the k, but never follow through. It sounds much closer to a silent K
I am probably not spelling this correctly... But what about "ngah"?
Yeah it sounds like that when they say "nggak', but i think it derives from tidak.
you mean "enggak"? "engga" and "enggak" are informal terms for no.