system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why don't astromech droids speak common?

Throughout all the movies and shows we can see that astromech droids serve a major role on spaceships of all purposes and sizes so why do they only talk in beeps and boops? Sure, many people that work with them can understand them but wouldn't it make it a lot more useful if they could communicate with everyone?
gpt
Leaving a language barrier helps to keep slaves in line. 

Because that's what most Star Wars droids are. We are given all the indications they are sentient, yet they are treated like property, and continually mind-wiped to keep them submissive.