Long gone seamen and traders made Italian its lingua franca.
She nods to me and greets her friends in Sesotho, the lingua franca among black South Africans in this mostly-poor region.
There the lingua franca is Cajun French, and folks love to fiddle, dance and most of all, eat.
lingua lin·gua (lĭng'gwə)
n. pl. lin·guae (-gwē')
A tonguelike anatomical structure.