I should have known that was wrong from the get-go. The French, for one, wouldn't put up with that, nor the Germans. The shape of the sign is international. The wordage is not.
What made me think I could trust Wikipedia?
Usually, wiki is pretty good with common knowledge...
If you look up the individual countries (I did three - Russian, France and Turkey) - all use the English word STOP. Turkey only shows DUR.
http://www.adcidl.com/pdf/Turkey-Road-Traffic-Signs.pdf
http://www.adcidl.com/pdf/Russian-Road-Traffic-Signs.pdf
http://www.adcidl.com/pdf/France-Road-Traffic-Signs.pdf