What is a language? A language is a group of arbitrary symbols that allows all members of the community to communicate and dialogue. These symbols contain socially and culturally acceptable meanings. Having a language is essential for everyone; all ordinary people speak, but non-human speaks. On the other hand, learning means learning or acquiring. Therefore language acquisition basically means acquiring or acquiring a language. Language acquisition is often seen as part of cognitive science.
Researchers scored language learning in two categories, first language acquisition and second language acquisition. Learning the first language is a universal process regardless of your mother tongue. The baby listens to the sounds around them, begins to mimic them, and eventually starts to produce words. Second language learns the knowledge of the first language hypothesis and includes processes that individuals experience when learning new language elements such as vocabulary, speech components, grammatical structure, writing system.
Second language acquisition (SLA), second language learning, or L2 (language 2) acquisition is the process by which people learn a second language. Second language acquisition is also a science field devoted to studying this process. The second language acquisition field is a sub-field of applied linguistics, but it is also subject to research in various other fields such as psychology and education. The central theme of SLA research is interlanguage and the language used by learners is not only the result of the difference between the languages they already know and the languages they are learning but also the complete language system. It has its own authority and has its own system rule. When a learner touches a target language, this inter-language language develops gradually.