Plutarch, Life of Antony
27.3-4 (tr. Bernadotte Perrin):
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. Nay, it is said that she knew the speech of many other peoples also, although the kings of Egypt before her had not even made an effort to learn the native language, and some actually gave up their Macedonian dialect.
ἡδονὴ δὲ καὶ φθεγγομένης ἐπῆν τῷ ἤχῳ· καὶ τὴν γλῶτταν, ὥσπερ ὄργανόν τι πολύχορδον, εὐπετῶς τρέπουσα καθ᾿ ἣν βούλοιτο διάλεκτον ὀλίγοις παντάπασι δι᾿ ἑρμηνέως ἐνετύγχανε βαρβάροις, τοῖς δὲ πλείστοις αὐτὴ δι᾿ αὑτῆς ἀπεδίδου τὰς ἀποκρίσεις, οἷον Αἰθίοψι, Τρωγλοδύταις, Ἑβραίοις, Ἄραψι, Σύροις, Μήδοις, Παρθυαίοις. πολλῶν δὲ λέγεται καὶ ἄλλων ἐκμαθεῖν γλώττας, τῶν πρὸ αὐτῆς βασιλέων οὐδὲ τὴν Αἰγυπτίαν ἀνασχομένων παραλαβεῖν διάλεκτον, ἐνίων δὲ καὶ τὸ μακεδονίζειν ἐκλιπόντων.