meant for translating for politicians and whatnot.
As Sarah pointed out, Droids serve different purposes.
That doesnt mean everyone would have to learn beep bop
It's less annoying to their owners. Imagine having servants yack around you all day.
why dont they teach all the other droids english?
Artoo is basically an engine component/repair system. Why make a droid talk when it would mostly just talk to other computers?