In plain words, ours
Her voice was sweet, and she could switch to almost any language. She rarely needed an interpreter and answered most foreign visitors herself.
There was sweetness also in the tones of her voice; and her tongue, like an instrument of many strings, she could readily turn to whatever language she pleased, so that in her interviews with Barbarians she very seldom had need of an interpreter, but made her replies to most of them herself and unassisted, whether they were Ethiopians, Troglodytes, Hebrews, Arabians, Syrians, Medes or Parthians.
Plutarch, Life of Antony 27.3Translated by Bernadotte Perrin (1920)Read the full passage (Plutarch, Life of Antony 27.3, opens scaife.perseus.org)