flowing tongue

"These savages speak strange languages, widely different from the flowing tongue of Memnon and Sesostris."

See Pope’s ‘Messiah’ throughout; Prior’s ‘Did sweeter sounds adorn my flowing tongue,’ &c. &c.

In the historic market place, as Saint-Prosper rode down the street, were assembled a number of lease-holders of both sexes and all ages, from the puny babe in arms to the decrepit crone and hoary grand-sire, listening to the flowing tongue of a rustic speech-maker.

Zoro spoke to them swiftly in a strange, flowing tongue.

The flowing tongue of the Sioux sounded melodious in the rich tones of the speaker’s voice.