Second-language acquisition

You can learn a new way to talk. This is called a second language. It can be your third or even fourth language too!

Some ways to talk are easy to learn. Others take a long time. For example, Italian is fast to learn. But Japanese can take much longer.

Your own way of talking might change. You might even use new hand moves. This happens as you learn.

Learning a new language is a big job. It uses your mind and your heart. It is a great way to learn about the world!

Learning a new way to talk is a big task. This is called second-language acquisition. It means learning any language after your first one. You might even learn a third or fourth language!

Scientists study how we do this. They look at how our memory works. They also look at how we talk with others. Some things help us learn. Your age and your drive to learn matter. Even your personality can change how you learn.

Not all languages are the same to learn. Some are easier for English speakers. Norwegian is easy because many words are similar. Other languages take much more time. For example, it takes about 24 weeks to learn Italian. But it can take 88 weeks to learn Japanese.

As you learn, your mind changes. You might even use new hand moves. Your first language might change in small ways too. Some people use a special way of talking while they learn. This is called an interlanguage. It is not just a set of mistakes. It is its own way of using rules. It is a real part of your journey.

Learning a new language is a fascinating journey. This process is called second-language acquisition, or SLA for short. It happens when you learn any language after your first one. You might even learn a third or fourth language! Researchers study this to see how our brains work. They look at how memory and attention help us. Some experts focus on how we talk with other people. Others look at the rules of the language itself. Your age and your drive to learn can change everything. Even your personality plays a part in how you succeed.

When people learn, they often create something called an interlanguage. This is not just a list of mistakes. It is a real system of rules in your mind. It is a special way of speaking that grows as you learn. It is not just a broken version of the new language. Instead, it is its own unique way of communicating. Researchers use this idea to understand how learners move toward fluency. This helps them see that errors are actually part of a logical process.

This field of study is quite new and very broad. It is a part of a bigger subject called applied linguistics. It also connects to psychology and the study of education. We do not have one exact start date for this science. However, two important papers helped shape how we study it today. Pit Corder wrote a famous essay in 1967 about learner errors. Then, Larry Selinker wrote about interlanguage in 1972. Since the 1980s, many different theories have helped us understand this process.

Not all languages take the same amount of time to learn. The Foreign Service Institute has studied how long it takes English speakers to learn. For example, Italian might take about 24 weeks of class time. Other languages, like Swahili, might take around 36 weeks. Some languages are much harder for English speakers to master. Arabic, Cantonese, Mandarin, Japanese, and Korean are among the most difficult. These five languages can take about 88 weeks to learn well. Japanese is often noted as being especially hard to learn.

Learning a new language can even change how you use your first one. You might change the way you pronounce certain sounds. You might even use different hand gestures when you speak. Some experts call this multi-competence. This means your languages are not separate boxes in your brain. Instead, they are related systems that work together. Even your ability to hear the rhythm of speech can change. This shows how deeply a new language connects to who you are.

Second-language acquisition, often called SLA or L2 acquisition, is the process of learning a language other than your native tongue. While the name suggests a "second" language, the term actually covers learning a third, fourth, or any subsequent language. SLA focuses specifically on what the learner does during this process. It is distinct from the methods used in formal language teaching, although teaching can certainly influence how a person acquires a language. Researchers study SLA to understand how humans develop linguistic knowledge. This field is broad and touches on many different areas of human life.

To understand how this works, researchers look through several different lenses. Cognitive approaches investigate how our memory and attention processes function during study. Sociocultural theories emphasize the importance of social interaction and immersion in a community. Meanwhile, linguistic studies examine both the innate and learned aspects of language itself. Individual factors also play a major role in how successful a learner becomes. These factors include a person's age, their level of motivation, and their unique personality traits.

One of the most important concepts in this field is interlanguage. Historically, people viewed learner mistakes as simply a broken version of the target language. However, the concept of interlanguage changed this view. Interlanguage refers to the unique linguistic system that grows in a learner's mind. It is not just a collection of random errors or a simple transfer of rules from a first language. Instead, it is a language in its own right with its own systematic rules. This system includes syntax, phonology, lexicon, and pragmatics.

The academic study of SLA is a relatively new sub-discipline of applied linguistics. Because it draws from psychology and education, it is an interdisciplinary field. While there is no single starting date, two specific works are considered instrumental. Pit Corder published a significant essay on the significance of learners' errors in 1967. Later, in 1972, Larry Selinker introduced the concept of interlanguage. Since the 1980s, the field has expanded to include many theories. These include universal grammar, connectionism, and skill acquisition theory.

Learning time and difficulty vary greatly depending on the specific languages involved. The Foreign Service Institute (FSI) has provided estimates for native English speakers. Category I languages, such as Italian or Swedish, require about 24 weeks or 600 class hours. Category II languages, like Swahili or Indonesian, take approximately 36 weeks or 900 class hours. Category III languages, such as Russian or Vietnamese, require about 44 weeks or 1100 class hours. The most difficult are Category IV languages, which include Arabic, Cantonese, Mandarin, Japanese, and Korean. These require about 88 weeks or 2200 class hours.

Adults learn languages differently than children who are learning their first language. Adults have mature minds and already possess a first language that shapes their thinking. This can lead to a phenomenon called the critical period hypothesis, which explains why adult pronunciation often remains non-native. When a learner's progress stops at a certain level, it is called fossilization. Interestingly, learning a new language can also change how you use your first language. This includes changes in pronunciation, syntax, or even hand gestures. Vivian Cook proposed the idea of multi-competence to describe these related mental systems.

Research also shows that there is often a specific sequence in how grammar is acquired. In English, for example, learners often follow a predictable order for certain structures. This sequence typically begins with the plural "-s" and moves through progressive "-ing" forms and irregular past tenses. Studies in the 1970s showed that this order remained similar across different native languages. This helped confirm that interlanguage follows its own internal logic. However, this order is not perfectly rigid for everyone. Factors like a learner's native language can make certain features, such as articles, more challenging to master.