How do parents know what a baby is saying? They don’t. They spend enough time learning what sounds and movements or facial positions mean to speculate what is being communicated.
Artoo speaks with whistles and beeps and he moves. I’m betting that in the time they spent together, Luke had a vague understanding of the general gist of what Artoo was trying to communicate.
Droids personalities also expand as time goes on and they learn, which is why wiping their memory often is something that happens in Star Wars. R2 and 3PO both skirt memory wiping many times.
Luke is reading a translation on a screen
https://static.wikia.nocookie.net/starwars/images/0/0c/Astromech_Translator_CCG.jpg
In the x-wing, that is made for the astromech sure.
How does he know what R2 is saying when they are not in the x-wing?
How do parents know what a baby is saying? They don’t. They spend enough time learning what sounds and movements or facial positions mean to speculate what is being communicated.
Artoo speaks with whistles and beeps and he moves. I’m betting that in the time they spent together, Luke had a vague understanding of the general gist of what Artoo was trying to communicate.
Droids personalities also expand as time goes on and they learn, which is why wiping their memory often is something that happens in Star Wars. R2 and 3PO both skirt memory wiping many times.