Stephen Krashen is one of the language acquisition experts. He has conducted a theoretical study on second language acquisition for many years and has considerable influence in the field of linguistics. He addressed the task of second language acquisition by introducing the five theories of mastering the second language. Aida Walqui is another expert; but she explores this topic in terms of background factors including second language learning. Even if Krashen and Walqui try to achieve similar goals, their approach is different.
In principle what is language acquisition? One area of theoretical computer science is called a learnable theory that attempts to answer this question (Gold, 1967; Osherson, Stob, & Weinstein, 1985; Pinker, 1979). Learning possibility theory defines learning as a four part scenario (this theory covers all forms of learning, but uses language as an example). Language type One of them is the "target" language learners master, but the learner certainly does not know - what it is. For children, the language category will include existing and possible human languages; the target language is the language used in their community.
Principles of Language Acquisition Stephen Krashen is one of language experts. He is doing a theoretical study on the subject of second language acquisition for many years and has given considerable influence in the field of linguistics by proposing five hypotheses of his second language theory. His view comes from his view, the best learning through contextual dialogue.
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.