kecap

In Malay and Indonesian, kecap (also written ketjap in older Dutch orthography) means a fermented sauce, most commonly kecap manis — a thick, sweet soy sauce that is the backbone of Indonesian cooking. The word likely derives from the Hokkien Chinese kê-tsiap, meaning the brine of fermented fish. Dutch and British traders encountered kecap in the ports of Java and the Malay Peninsula in the 1600s and brought the word — and the concept — back to Europe.

In 18th-century England, ketchup meant a thin, dark, fermented sauce made from mushrooms, walnuts, or anchovies. It bore no resemblance to modern tomato ketchup. Hannah Glasse's 1747 cookbook The Art of Cookery included a recipe for 'ketchup' made from mushrooms and anchovies — closer to Worcestershire sauce than to anything you would put on a hamburger. The word had traveled from Malay fish sauce to English mushroom sauce in a century.

Tomatoes entered the picture in America. James Mease published the first known tomato ketchup recipe in 1812. Henry J. Heinz began selling bottled tomato ketchup in 1876, and by 1907 the company was producing twelve million bottles a year. The Malay word for fermented fish brine was now a brand name for sweetened tomato paste. Every ingredient had changed. Only the name survived.

In Indonesia today, kecap manis remains essential — it sweetens nasi goreng, glazes satay, and darkens stir-fries. Indonesians who encounter American ketchup for the first time are baffled that the same word names both products. The connection is real but the divergence is total: two sauces sharing a name across twelve thousand miles and three centuries, with nothing else in common.