system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] R2D2 has a module that allows him to make beeps, whistles, and other noises. Why couldn't this module be swapped for one that actually talks?

He is obviously capable of expressing complex thoughts and ideas. He also has a lot of space inside, including spare space for storing things, such as Luke's lightsaber. Why not use some of this space for a voice modulator?
gpt
R2 communicates using language via his readout screen, which will transmit its messages to a similar screen in the x-wing cockpit... his main purpose is riding in his slot in the x-wing, and thus it is felt that voice communication would be distracting to the pilot... his beeps and whistles do carry meaning, and an experienced pilot will know what is on the readout screen by the sounds the droid is making...