* He was born and lived in Flanders: This means he would have spoken Flemish (Dutch).
* He was educated in Antwerp: He likely learned Latin, the language of scholarship at the time.
* He travelled extensively: Rubens lived in Italy for several years and traveled throughout Europe. This suggests he may have learned some Italian and possibly French.
Therefore, it's safe to say Rubens spoke at least two languages: Flemish and Latin. He likely also had some level of proficiency in Italian and French.
It's important to note that historical records don't provide specific details about Rubens' language skills. However, his extensive travels and the nature of his work as a diplomat suggest he was multilingual.