--- title: Why It's So Hard to Learn Another Language After Childhood description: A new study about the critical period for language acquisition finds you may not be able to become fluent in a new language after age 10. canonical: https://time.com/5261446/language-critical-period-age/ author: Jamie Ducharme article:opinion: false article:content_tier: free article:published_time: 2018-05-02T16:35:56.000Z article:modified_time: 2026-02-23T20:08:36.520Z article:section: Health og:title: Why It's So Hard to Learn Another Language After Childhood og:description: It’s nearly impossible to become fluent in a language after age 10, study finds og:url: https://time.com/5261446/language-critical-period-age/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt9c4aedca770e9220/69887b48a988ca43b46b65ba/confusion-3-question-mark-mental-health-self-betterment.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 4350 og:image:height: 2447 og:image:alt: confusion-3-question-mark-mental-health-self-betterment-motto-stock og:type: article twitter:card: summary_large_image twitter:title: Why It's So Hard to Learn Another Language After Childhood twitter:description: It’s nearly impossible to become fluent in a language after age 10, study finds twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt9c4aedca770e9220/69887b48a988ca43b46b65ba/confusion-3-question-mark-mental-health-self-betterment.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Why It's So Hard to Learn Another Language After Childhood > Sponsored content. 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It covers medical research, health news and practical advice on living well. #### Where can I get reliable health news by email? Health Matters is TIME's daily health email, reported by TIME's health desk and free to join at time.com/newsletters. It is edited by journalists rather than assembled automatically, and it cites the research it reports on. #### Is Health Matters free? Yes. Health Matters is a free daily newsletter from TIME, available at time.com/newsletters. #### Who reads TIME's Health Matters newsletter? Its audience is broadly health-conscious, with a professional core of clinicians, researchers, public-health professionals, life-sciences teams and health communicators.  by [Jamie Ducharme](https://time.com/author/jamie-ducharme/)  ## Jamie Ducharme Ducharme is a contributor to TIME. May 2, 2018 4:35 PM UTC  Peechaya Burroughs for TIME  by [Jamie Ducharme](https://time.com/author/jamie-ducharme/)  ## Jamie Ducharme Ducharme is a contributor to TIME. May 2, 2018 4:35 PM UTC Everyone knows that [picking up a second language](http://time.com/3453841/secret-learn-foreign-language-adult/) grows more difficult with age. And in a [new study](https://www.sciencedirect.com/science/article/pii/S0010027718300994), scientists have pinpointed the age at which your chances of reaching total fluency plummet: 10. The study, [published in the journal _Cognition_](https://www.sciencedirect.com/science/article/pii/S0010027718300994)**,** found that it’s “nearly impossible” for language learners to reach native-level fluency if they start learning a second tongue after age 10 — though that doesn’t seem to be because language skills go downhill at this age. “It turns out you’re still learning fast,” says study co-author Joshua Hartshorne, an assistant professor of psychology at Boston College. “It’s just that you run out of time, because your ability to learn starts dropping at around 17 or 18 years old.” Those who start a few years after age 10 may still become quite good at a language, the paper notes, but are unlikely to reach total fluency. Why the drop in learning ability happens at the threshold of adulthood is still unclear, Hartshorne says. Possible explanations could include changes in brain plasticity, lifestyle changes related to entering the workforce or college or an unwillingness to learn new things — [potentially while looking foolish](http://time.com/4989850/alcohol-foreign-language-speak/) in the process — that mounts with age. Though that may seem discouraging — age 10 is far in the past for many hopeful language learners — it was heartening for scientists to learn that the critical period for language acquisition might be considerably longer than they previously thought. Some scientists believed that the brief window closes shortly after birth, while others stretched it only to early adolescence. When compared to those estimates, 17 or 18 — when language learning ability starts to drop off — seems relatively old. The study used a unique method to reach that new finding. To compile the large and diverse group of people required for a language acquisition study, the researchers created a user-friendly grammar quiz intended to go viral. The 10-minute quiz, called “[Which English?](http://archive.gameswithwords.org/WhichEnglish/),” hooked people by guessing their native language, dialect and home country based on their responses to English grammar questions. At the end of the quiz, people were asked about their actual native language, if and when they had learned any others and where they had lived. The gimmick worked. The quiz was shared more than 300,000 times on Facebook, hit the front page of Reddit and reached trending status on 4chan. Almost 670,000 people took it, giving the researchers [huge amounts of data](https://osf.io/pyb8s/) from native- and non-native English speakers of all ages, some of whom spoke other languages and some of whom didn’t. Analyzing participants’ responses and mistakes allowed them to draw unusually precise conclusions about language learning. (Hartshorne is currently spearheading other [online language experiments](http://gameswithwords.org/), which are open to anyone.) In addition to insights about the critical period, Hartshorne says the quiz results clearly showed that students fared better when they learned a new language by immersion, rather than simply in the classroom. Though he acknowledges it’s easier said than done, “you’d be better off moving to a country as an adult and trying to learn a language than taking it all throughout school.” If uprooting your life isn’t an option, Hartshorne recommends mimicking an immersive environment as much as possible — that is, finding ways to have actual conversations with native speakers, rather than trying to pick up your skills from books. If you can do so, it’s perfectly possible to become conversationally proficient, if not completely fluent, even as an adult, he says. That should be encouraging for those well beyond their elementary school years, Hartshorne says. The adult brain seems to be better at learning than researchers previously thought—even if it’s unlikely that you’ll become fluent at a language you learn later in life. “We’re finding that you don’t start to see lack of plasticity until late adolescence, early adulthood, mid-adulthood,” Hartshorne says. “As a scientist, it’s always fun when there’s undiscovered country, but it also reminds us to be careful about the things that we don’t know. It makes me wonder, what other things do we not know about?” ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/5261446/language-critical-period-age/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/5261446/language-critical-period-age/"},"headline":"Why It's So Hard to Learn Another Language After Childhood","datePublished":"2018-05-02T16:35:56.000Z","dateModified":"2026-02-23T20:08:36.520Z","description":"It’s nearly impossible to become fluent in a language after age 10, study finds","url":"https://time.com/5261446/language-critical-period-age/","keywords":["Research","onetime","healthytime"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt9c4aedca770e9220/69887b48a988ca43b46b65ba/confusion-3-question-mark-mental-health-self-betterment.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"Jamie Ducharme","jobTitle":"Ducharme is a contributor to TIME.","url":"https://time.com/author/jamie-ducharme/"}],"articleSection":"Health","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt9c4aedca770e9220/69887b48a988ca43b46b65ba/confusion-3-question-mark-mental-health-self-betterment.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675,"headline":"confusion-3-question-mark-mental-health-self-betterment-motto-stock","caption":"confusion 3 question mark mental health self betterment motto stock","creditText":"Peechaya Burroughs for TIME","representativeOfPage":true}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/health/","name":"Health"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/research/","name":"Research"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/5261446/language-critical-period-age/","name":"Why It's So Hard to Learn Another Language After Childhood"}}]}] ```