I have to say that I am a little suspicious of a Sumerian dictionary that includes the Sumerian word for “chocolate.”By Ghu, he’s right. There it is: sukulutu. This is dubious indeed. Sukulutu is phonetically way too similar to “chocolate,” a word derived from the 16th C. Spanish word chocolatal, which was either the Spaniards’ version of the Aztec word xocoatl (or cacahuatl), or the Spaniards’ munged version of an older Mayan word, cacahuaquchtl. It gets complicated.
This known date of origin interacts badly with the history of Sumerian, which died out as a spoken language around the 18th C. BCE, though it hung on as a written language until the 1st C. CE. This misses by several centuries the earliest known Mayan use of words related to “chocolate”, not to mention the Mayans and Sumerians were on different and non-communicating continents; and even if they weren’t, you’d have the problem of how a Mayan word got adopted into a language that hadn’t been spoken for a couple of millennia.
Besides, if Sumerian had had a word for chocolate, that would have been cool, and we would have heard about it.