The document discusses how the human brain learns and processes language. It describes that language is a code that the brain cracks by relating symbols like letters and words to meanings. The left hemisphere of the brain contains areas like Broca's and Wernicke's areas that allow understanding, recognizing, reading, and speaking language patterns. While the right hemisphere controls the left side of the body, the left hemisphere controls the right side and is also dominant for language in most people. Younger students tend to excel at pronunciation in a second language, while older students are faster initial learners due to more background knowledge and learning skills.