i once read on a zelda site the story behind that is the trifoce originally was gaurded by the hyrulian royal family. later in a great war the inkans were great allies of the hyrulians. in the end almost all incans where destroyed but some sole surviors started the society anew. others became part of th hyrulian society but never lost touch to there roots and spread customs and legends  dealing with the triforce to other icans and that is the deal of the triforce in ican psocity. it doesn't reaveal who they said that is a compony secret . the poe sisters it said they where both soilders in the war that died. when one died in the war the other killed herself cause she was depressed cause of her sisters death. the forest temple was an ican structure and the great duku tree helped with. strangly he was also an ican but i guess it makes sense since he guards the whole forest and the forest temple is part f it and he knew so much about the triforce
Local Mods : please move to zelda fan forum i put it here ncause its not posting correctly there

Edit: Sorry, I had to put in a few periods to make it a bit more readable.

OK, first I have to say this: Please use some punctuation next time. That post is almost impossible to decipher. I was going to insert some commas too, but I figured I should leave it close to your original post.

As for the content, you really don't explain anything. You just threw out a bunch of names that don't really connect with anything. Who are the Inkans/Incans/Icans? What did they do? How is the Deku Tree related to them? Honestly, right now it's just a jumble of words.

So, what does this explain?

Did Nintendo confirm this? Other wise there is a reason we never knew it, that reason being it is not true. You cant just uncover things in a video game world, Nintendo literally has to create the facts.