Who is the patron saint of learning a language?

There isn't a single patron saint specifically for learning a language. However, there are several saints associated with various aspects of knowledge, communication, and education that might be considered relevant:

* Saint Jerome: Often considered the patron saint of translators and scholars, as he translated the Bible into Latin, making it accessible to a wider audience.

* Saint Catherine of Alexandria: A martyr known for her wisdom and eloquence, she could speak many languages and was said to have debated with pagan philosophers.

* Saint Thomas Aquinas: A theologian and philosopher known for his intellectual prowess and pursuit of knowledge.

* Saint Brigid of Kildare: An Irish saint known for her wisdom and her role in establishing schools and monasteries.

Ultimately, the choice of a "patron saint" for learning a language is somewhat personal. You could choose the one whose attributes resonate most with you, or you could consider the specific language you're learning and see if there are any saints connected to that culture or language.