When a contact is tied to a particular language, messages can be automatically translated using Babel Fish (website).
Foreign Language Translator (Babel Fish)
The Babel Fish is small, yellow, and simultaneously translates from one spoken language to another.
Perhaps the most notorious instance involved getting a Babel Fish out of a dispenser in the hold of the Vogon ship.
That particular puzzle became so notorious for its difficulty that Infocom wound up selling T-shirts bearing the legend, "I got the Babel Fish!"
The web address for Babel Fish remained babelfish.altavista.com until May 9, 2008, when the address changed to babelfish.yahoo.com.
AltaVista provided Babel Fish, a web-based machine translation application that translates text or web pages from one of several languages into another.
Inside his still-standing home, Arthur finds a gift-wrapped bowl inscribed with the words "So Long and Thanks..." which he then uses for his Babel Fish.
In the radio series, Arthur is saved by the Babel Fish, which can teleport itself, along with its carrier, out of danger.
Includes additional photographs and information on Protichnites from the exceptional Blackberry Hill localities; in Italian, but can be translated using Babel Fish.