orthoépique (French) comes from French orthoépie, from Ancient Greek ὀρθοέπεια, from Ancient Greek ἔπος, from Ancient Greek ϝέπος, from Proto-Hellenic wékʷos, from Proto-Indo-European wékʷos, from Proto-Indo-European wekʷ- — to speak, to sound out.
orthoépique (French): orthoepic