The brain input language skills refer to the ability of the brain to understand and process language. Language acquisition involves structures, rules, and representation, and the capacity to use language successfully requires one to acquire a range of tools including phonology, morphology, syntax, semantics, and an extensive vocabulary. The four language skills are listening, speaking, reading, and writing, which are related to each other in two ways: the direction of communication (in or out) and the method of communication (spoken or written) . Understanding language is a process that involves at least two important brain regions, which need to work together in order to make it happen. These brain areas are mainly located in two regions, in the left side of the brain, and are connected by nerves. Together, these brain regions and their connections form a network that provides the hardware for language in the brain. The nature of the language input affects brain activation during learning from a natural language, and brain imaging research may eventually help us match individual adult learners with the optimal learning contexts for them. It has been established that humans’ capacity to use their native language is stored in the left hemisphere of the brain in over 90% of the normal population, and the main parts of the brain involved in language processes are the Broca’s area, located in the left frontal lobe, which is responsible for speech production and articulation, and the Wernicke’s area, in the left temporal lobe, associated with language development and comprehension.