Understand any language?
The mind creates and generates thoughts of what one wants to express. The thought is then translated into one's spoken language. To understand and communicate with one of an unfamiliar tongue, simply still one's mind and direct all energy to witnessing one's thoughts at the tool level of creation. Hear the signals in formation. Slow the process down and comprehend the subtle movements of thoughts before they become words.
Before a thought is made the energy is created by one's state of being. To go beyond thoughts or words observe one's state of being. Observe one's feelings. Experience the body and one's experiential existence the way that they do. From that perspective, no thought or word is needed.