* Classical languages: Latin and Greek were considered essential parts of a well-rounded education for upper-class children of that era.
* Modern languages: While the specific languages aren't definitively known, it's likely he taught her French and possibly other European languages, as these were common for people of their social standing.
However, it's important to note that there's no direct evidence specifying exactly which languages he taught her. We know he was passionate about education and instilled a love of learning in Florence.
Florence herself was known to be fluent in French and had a working knowledge of German. She also studied Italian and Spanish later in life.