Comment by saghm

Honestly, what strikes me about this line isn't even that Vader isn't Luke's father, but how wordy he is. I imagine they didn't spend too much time on phrasing and instead just tried to capture the gist with the expectation of polishing later, but even with the James Earl Jones's trademark slow, menacing Vader drawl, this just feels like it would sound weirdly verbose coming from Vader, especially in the middle of a fight.