The Isthmian script is an early set of symbols found in inscriptions around the Isthmus of Tehuantepec, dating to c. 500 BCE – 500 CE, though with dates subject to disagreement. It is also called the La Mojarra script and the Epi-Olmec script ('post-Olmec script'). It has not been conclusively determined whether Isthmian script is a true writing system that represents a spoken language, or is a sy
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