The Southwest Script, also known as Southwestern Script, Tartessian, South Lusitanian, and Conii script, is a Paleohispanic script used to write an unknown language typically identified as Tartessian. Southwest inscriptions have been found primarily in the southwestern quadrant of the Iberian Peninsula, mostly in the south of Portugal (specifically in the Algarve and southern Alentejo), but also in Spain (in southern Extremadura and western Andalusia).
The Paleohispanic scripts are the ancient writing systems created in the Iberian Peninsula before the Latin alphabet became the dominant script. They derive from the Phoenician alphabet, with the exception of the Greco-Iberian alphabet, which is a direct adaptation of the Greek alphabet. Some researchers believe that the Greek alphabet may also have played a role in the origin of the other Paleohispanic scripts. Most of these scripts are notable for being semi-syllabic rather than purely alphabetic.
Paleohispanic scripts are known to have been used from the 5th century BCE—possibly as early as the 7th century, according to some researchers—until the end of the 1st century BCE or the beginning of the 1st century CE. They were the primary scripts used to write the Paleohispanic languages.
The southeastern Iberian script, also known as Meridional Iberian, was one of the means of written expression for the Iberian language, which was primarily written in the northeastern Iberian script and, to a lesser extent, by the Greco-Iberian alphabet. In understanding the relationship between the northeastern and southeastern Iberian scripts, some note that they are two distinct scripts with different values assigned to the same signs. However, they share a common origin, and the most widely accepted hypothesis is that the northeastern Iberian script was derived from the southeastern Iberian script.
In fact, the southeastern Iberian script is very similar to the Southwestern script, which is used to represent an unknown language typically referred to as Tartessian, both in terms of the shape of the signs and their values. The main difference is that the southeastern Iberian script does not exhibit the vocalic redundancy found in the syllabic signs of the northeastern Iberian script.