This being the most widely used type of magic but there's also runic magic it's not that different from normal spell casting and despite its name it seems to not use any language only numbers and symbols as far as I can tell. In fact the two branches of magic are almost identical. The spell matrix and runic matrix being interchangeable with each other. The big difference being that a spell matrix is formed in the mind and a runic one is formed outside the body using magic to draw it.