Galactic Basic Standard, or basic for short, was the official form of communication in most areas of the galaxy, particularly under the iron-fistedly-monolingual reign of the Galactic Empire. It was derived from Proto-Mando-Basic, the common root language for all humanoids.
Because it was so very…well…basic (pause for laughs), Basic eventually differentiated into dialects that evolved into the following languages:
To facilitate communication among the hearing-impaired, a new form of basic was developed that involved hand gestures. It was referred to as Visual Basic.