In Hesiod’s account of Pandora, Hermes placed speech in her mouth.
The detail appears in the creation scene in Works and Days. Zeus commands the gods to make Pandora, and Hephaestus forms her from earth. Other deities add qualities and adornments, while Hermes gives her speech. This makes Hermes part of the divine process that equips Pandora before she is sent among humans.
Hermes is an appropriate figure for this role because Greek mythology associates him with communication, language, messages, and persuasion. Hesiod’s description is not identical to every later retelling, however. Modern books, films, and illustrations often simplify the creation into a single act by Zeus or Hephaestus.
The question is also easy to confuse with Athena’s role. Athena is associated with clothing and craft in the account, while Hermes is the god connected specifically with speech. Translations can vary in their phrasing, using “voice,” “speech,” or “words,” but they identify Hermes as the giver.