No, but it's how the real, pre-existing, not-made-up word is actually pronounced.
And does "sign" look to you like it should be pronounced "siggin?"
"siggin" actually sounds cool...
Not to drag on a meaningless debate any further, but just incase it seemed I was berating you in particular, I just wanted to say I wasnt, just a mini half hearted rant at words.
Besides, I saw "Indign" in the book and read In-Dig-N. Nothing more, nothing less. If that isnt grammatically correct, then meh.