* Saint Teresa of Ávila (1515-1582), also known as Saint Teresa of Jesus, was a Spanish Carmelite nun and mystic. She primarily spoke Spanish, but she also knew some Latin, which was the language of scholarship and the Church at the time. It's possible she might have learned some other languages through her travels and interactions with other religious figures, but there's no definitive evidence of this.
* Saint Thérèse of Lisieux (1873-1897), also known as Saint Thérèse of the Child Jesus, was a French Carmelite nun. She spoke French, but her knowledge of other languages is less certain. She might have learned some Latin for religious purposes, but there's no record of her speaking any other languages fluently.
It's important to note that both Saint Teresas were primarily focused on their religious life and writings. They were not known for their language skills or for traveling extensively, so it's unlikely that they would have had the opportunity to learn many languages.