Droids and Computers
Droids (robots) and computers in Star Wars use either the natural languages or machine languages. C-3PO is "fluent in over six million forms of communication" and protocol droids are often employed as translators. Astromech droids such as R2-D2 communicate through an information-dense language of beeps and whistles known as Binary; devices exist that can translate this language into Basic. A few non-droids can also learn to understand it through working with the droids for long periods of time, and protocol droids are able to translate Binary into other languages.
Read more about this topic: Languages In Star Wars