High Valyrian is her native language, though how she learned it is unexplained. High Valyrian is a dead language used only by scholars and priests, much like our Latin. In Bravos they speak Low Valyrian, of which there are nine other branches native to the free cities and Slaver's Bay. She speaks many Low Valyrian dialects as well, though it's never discerned which ones. The Ghiscari mongrel tongue is especially guttural, showing just how foreign a dialect can become over the centuries.