In July 2012 an anonymous vandal changed the name of the shape that appears on the symbol Tokelau from “Tuluma” to “Flopiorkdich” in the English Wikipedia article about it. It stayed there until I fixed it today.
In the meantime that word spread out to other websites. Google for it. It was also copied as is to the Greek version of that article, and I fixed it there, too.
It reminds me of the story of the weird wrong Hebrew spelling of messiah, which was being mindlessly copied from the English Wikipedia to other websites until I fixed it. (Hello again, Pastor Roland Gloria Jr.! I really want to visit your church some day.) I wonder whether it’s possible to build a bot that would flag such edits, where a vandal adds a word that can’t be found elsewhere using Famous Search Engines.