There are two ways to develop language ability: acquisition and studying.
Acquiring a language means building an intuitive knowledge of it. Acquisition is how we all learned our native language. Most of us don't know the grammar rules of our native language — we just know what sounds right and what doesn't. When speaking, we don't think about grammar or vocabulary. We think about the meaning we want to convey and the words flow naturally.
For example, if you're fluent in English, you'd agree that "the big red dog" sounds more natural than "the red big dog," but you probably aren't aware of the complicated grammar rule of adjective order that makes it so.
Studying a language, on the other hand, is the act of learning about the language. Most language learning products focus on this "skill-building" approach — teaching you vocabulary and grammar as building blocks to construct sentences, a lot like a Madlibs game. Using this method, you translate your thoughts from your native language into your target language.
No amount of skill-building alone will make you fluent.
This may seem counter-intuitive. After all, skill-building is how you learned every other subject in school. Language is not like other subjects, however.
What sounds "right" or "wrong" in a language often doesn't follow predictable rules. You might be able to translate a phrase word-for-word from English to Korean, but it probably won't make sense. Even if it does, it won't sound natural. Languages are highly specific in unpredictable ways. It's impossible to hold every grammar rule and language-specific phrasing in your head while trying to have a conversation.
Fortunately, your brain has a built-in mechanism for exactly this problem. Every one of us was born with the ability to naturally acquire language. Contrary to popular belief, this ability does not disappear when you become an adult. In fact, by pairing your mature analytical mind with your innate language acquisition ability, you can learn languages faster than children.
Our brains are pattern recognition machines. This ability allows us to recognize the faces of other people, play chess, appreciate art or music, and — yes — learn languages.
Children learn language through exposure from their parents. Parents interact with their children, narrate their experiences, and often use simpler speech with added gestures: Modified Input
Uh oh! The ball rolled off the table. Are you hot? Here, let's take off your sweater. Do you want the red one or the blue one?
Children acquire language because they understand the meaning behind the message. They listen to the world around them and desperately want to know what the adults are talking about and join the social group.
Over months and years of continuously hearing their parents, teachers, and relatives speak to them, their little brains decode the common patterns and they learn to speak like a native, without apparent effort.
As adults, we don't have a parent to talk to us 24/7, but we do have access to the entire internet. Using widely available media, we can emulate the language acquisition process — with some important differences.
The most obvious one is that you aren't a toddler. It's unreasonable to spend 14 hours per day being cared for by a native speaker who is constantly giving you level-appropriate language to listen to.
You also already speak at least one language natively. This does affect your learning, but it can be used to your benefit. Babies don't have the option of looking up new words in a dictionary or referencing a textbook. You can.
And finally, you're smarter than a 2-year-old. You can leverage your adult knowledge to learn much more quickly with the help of modern tools, the ability to read, and intentional study.
You won't learn exactly like a child, but throughout your journey, you'll replicate many of the same processes that you used to learn your native language.
The Refold method uses both acquisition and study — but in the right balance. Study (what we often call "priming") prepares you to understand things in the language. You leverage your adult brain to take shortcuts and learn more quickly. But then acquisition (through immersion) is where the real learning happens. Study supports acquisition, but can never replace it. The Pillars of Language Learning
The distinction between acquired (implicit) and studied (explicit) knowledge has been explored extensively in second language acquisition research. Krashen's Principles and Practice in Second Language Acquisition (1982) introduced the acquisition-learning distinction that underpins this article, and neurolinguistic research by Paradis (2009) has provided evidence that these two types of knowledge are stored in separate brain systems. The strong claim that explicit knowledge cannot become implicit knowledge is debated — skill acquisition theory (DeKeyser, 2007) (a single chapter in this book) argues that it can, through extensive practice — but the core point holds: explicit study alone isn't enough.
The claim that adults can acquire language like children is supported by Hartshorne, Tenenbaum & Pinker (2018), who found that the "critical period" for language learning extends much later than previously thought and that decline is gradual, not sudden. Marinova-Todd, Marshall & Snow (2000) addressed common misconceptions about age and language learning directly. Adults may have slight disadvantages in ultimate phonological attainment, but have significant advantages in rate of learning due to cognitive maturity, literacy, and metacognition.
The idea that our brains are pattern recognition machines that decode language statistically is supported by Saffran, Aslin & Newport (1996), who demonstrated statistical learning in 8-month-old infants, and Batterink & Neville (2013), who showed that the brain processes syntax even without conscious awareness.
The effectiveness of combining explicit study with immersion — rather than relying on either alone — is well-supported by the form-focused instruction literature, including Ellis (2016) and Wong & VanPatten (2003), who showed that traditional grammar drills are far less effective than meaning-focused activity paired with brief form-focused attention.