It has been "translated"! Idiomatic expressions need not be translated word by word. But you have a point here. Surely, the translation had better be as close as possible to the source text. As you see, the request for this translation hes been "meaning only". I think, we can say that the meaning of "يه عالمه" is "خيلي". But it has other nuances as well. Maybe, I had better write "I love you as big as the world." What's your opinion? And thanks for the comment.