Slavic languages usually call both semaphores, other languages have their own word, usually derived from a lamp, or signal device (Die Ampel in German - meaning “hanging lamp”)

Edit: Realized that czech language calls the mechanical signal devices just “signal device” (signalizační zařízení) and “semaphore” (semafor) is used for light signals. Although semaphore is a french word, French call them traffic lights like in english.