https://en.wikipedia.org/wiki/Mayday https://en.wikipedia.org/wiki/Mayday I think these particular words are older than many of the other ones. Also French-der

https://en.wikipedia.org/wiki/Mayday https://en.wikipedia.org/wiki/Mayday I think these particular words are older than many of the other ones. Also French-derived is CQ, which comes from the French sécurité. These phrases date back to when French was used much more as an international language.