The act of communicating with a female who speaks a foreign language by using your mouth, lips, and tongue to stimulate her genitals.
"Mr. O'Donaghue, how did you persuade Mme. Ambassador to agree to the terms of the Treaty if she only speaks Swahili and French and no one at the Irish Embassy was available to translate?"
"My cunnilingua franca is not too bad I tell you. Not too bad at all."