In the play, "Love's Labour's Lost," the author puns twice in the French language--once when he use the word "capon" in the double sense of a fowl and a love letter, and again when he uses the word "paint" in the double sense of the tip of a sword and a strong French negative. If follows that the author must have had not only a knowledge of the French language, but was also a fluent French scholar. This play also contains many sentences in Latin, Spanish and Italian.
It must be remembered that Francis Bacon spent nearly three years in France in his youth after leaving Cambridge.