I'm positive he never said "Luka"
Edward talks to Bella about it in the tent while he knew that Jacob could hear, although Bella didn't know that. He says that Jacob had to know sometime but Bella gets mad at him.
He says that because Edward leaves Bella. Jacob means he will never leave Bella like Edward did.
In the beginning of Eclipse, Bella puts the letter from Jacob in her pocket. She says that she feels heavier now, that she thinks about it, as well.
As it says in The Twilight Saga: The Official Illustrated Guide, Jacob decides to kill Edward on his own, Carlisle meets Jacob at the door, and Bella calls to Jacob from inside. Jacob sees Edward, who looks like he's in agony, half-crazed; Bella is still human but looks sick and haggard - she is pregnant.; Edward takes Jacob outside to talk: Edward looks like a man being burned at the stake; he knows it's all his fault; he had no idea this could happen; Rosalie is protecting Bella; Edward asks Jacob to talk to Bella, to tell her she can have a baby with him; Jacob knows Bella will reject him; Edward promises that the moment Bella's heart stops beating, he will beg Jacob to kill him; Jacob tells him they have a deal. (This is exactly what The Twilight Saga: The Official Illustrated Guide says)
He actually says "loca" which is spanish for crazy. See his answer below from: http://screencrave.com/2009-11-18/taylor-lautner-interview-for-new-moon/Your character says 'loca' to Bella. Do you speak Spanish, and are you going to be speaking more of it in the future?TL: I don't' speak much Spanish. I took it in school, that was about it. I think it's Jacob's personality. He's outgoing, he's random. It definitely doesn't have anything to do with his character just the fact that he's friendly and you never know what to expect.
Bella says that the wolf pack which is Sam and his group she says that they are not good for Jacob.
in the movie he says something in his native language ,which is "Stay with me forever." Jacob says I love you
Edward talks to Bella about it in the tent while he knew that Jacob could hear, although Bella didn't know that. He says that Jacob had to know sometime but Bella gets mad at him.
He says that because Edward leaves Bella. Jacob means he will never leave Bella like Edward did.
He never says that, but I suppose he would :)
Jacob
Jacob says stay with me forever.
In the beginning of Eclipse, Bella puts the letter from Jacob in her pocket. She says that she feels heavier now, that she thinks about it, as well.
That is a question Stephenie Meyer has never fully answered. She does explain about how much fun Jacob and Bella had when they were kids, but she never says if he did or not have a crush on her. But, he probably did.
He says he will...
Bella asks Jacob if he could fix the truck for her.
In Breaking Dawn Edward tells Jacob the he can kill him if Bella dies seeing as he doesn't want to live without Bella. At first Jacob agrees however later on, once they believe Bella to be dead, Jacob says he will not kill Edward as he wants him to suffer.