In today’s interconnected world, being multilingual is a significant asset. However, myths surrounding multilingualism often discourage individuals from embracing or encouraging language learning. Let’s address some of the most common misconceptions and reveal the truths backed by research.

Myth 1: Raising Children in a Multilingual Home Causes Speech Delays or Confusion
Fact: There is no evidence that growing up in a multilingual environment leads to speech delays or confusion. Studies (Including Journal of Child Language published by Cambridge University Press in 2025) have shown that children exposed to multiple languages reach developmental language milestones at the same rate as their monolingual peers, and in some cases, even earlier. Far from causing confusion, learning multiple languages can enhance cognitive abilities, such as problem-solving and multitasking. The key is consistency and support in language exposure, which helps children develop proficiency in each language seamlessly.

Myth 2: Mastering One Language at a Time Is More Efficient
Fact: The human brain is incredibly capable of managing and retaining multiple languages simultaneously. Earlier theories, like the “separate underlying proficiency” hypothesis, suggested that learning multiple languages might limit the brain’s capacity to learn multiple languages at comparable levels of proficiency.  This has been thoroughly debunked. Learning multiple languages simultaneously is absolutely possible. The brain is wired for such learning and development.

Myth 3: It’s Too Difficult for Adults to Learn New Languages
Fact: According to Dr. Suzanne Flynn, MIT Professor of Linguistics and Language Acquisition,  individuals maintain the ability to learn new languages at any age.  In fact, research has shown that adults have certain advantages in language learning when compared to children. Adults are more developed cognitively which can serve them well in terms of the acquisition of new languages.  One area that people often ask about concerns the adults’ ability to acquire the new sound systems of the target languages.  We know that with focus and practice, adults can acquire the new sounds of new languages and reach native-like levels.  It takes time. Adults often have to learn new motor sequences that underlie the articulation of new sounds.  Children are still in the process of learning the sounds of their first languages.  Their motor programs are somewhat more flexible at these early stages.  However, it is important to stress that adults are still capable of learning new sounds as long as they have the desire, time, energy and patience. The “difficulties” often  noted by adult learners lies not in the brain's capacity to learn new languages but in overcoming one’s own fears and beliefs that it is not possible.  Clearly, you can teach an old dog new tricks!

The Benefits of Multilingualism
Debunking these myths isn’t just about correcting misconceptions. It’s also about celebrating the benefits of multilingualism, which is what LEX Language Project is all about. Learning multiple languages fosters cultural understanding, enhances cognitive function at many, many levels and opens up social and professional opportunities. Research has shown that multilingual individuals often display improved memory, creativity, adaptability, and enhanced executive functions making multilinguals better equipped for the challenges of a globalized world.

Encouraging Multilingualism
Parents and educators play a crucial role in promoting multilingualism. By creating environments where multiple languages are valued and practiced, they can help individuals of all ages unlock their linguistic potential. Whether it’s through immersion programs, bilingual education, or daily conversations at home, the journey to becoming multilingual is both enriching and rewarding.

Final Thoughts
The myths surrounding multilingualism often stem from outdated research or misunderstandings about how the brain acquires and processes language. By embracing the truth that the human brain is wired for language throughout one’s lifetime, we can foster a world where multilingualism is celebrated as a path to personal growth and global connection. Let’s break down these barriers and encourage language learning for all!

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In a world where multilingualism is increasingly celebrated, certain books highlight the innovative language-learning methods that make it possible for families to immerse themselves in multiple languages naturally and joyfully. Drawing from groundbreaking works like Yo Sakakibara’s Language Is Our Music, LEX/Hippo Family Club offers unique approaches to language acquisition that combine immersion and play. These books, filled with heartwarming stories, scientific insights and practical advice, inspire families to embrace multilingual adventure, turning everyday life into a language-learning experience that feels as natural as speaking. Whether you’re looking to understand the theory behind multilingualism or explore fun, immersive activities for the whole family, these Linguistics & STEM books offer a diverse, accessible and inspiring approach.​

1. Language Is Our Music: The Natural Way to Multilingualism
​by Yo Sakakibara
​Discover the groundbreaking language learning methods of Yo Sakakibara. From heartwarming tales of kids picking up languages to scientific dives into vowel sounds, Sakakibara explores everything from musical scales to the essence of being human. His innovative ideas come to life at LEX / Hippo Family Club, where people of all ages immerse themselves in multiple languages through “singing the sounds of language” via mimicking audio stories and other fun group activities. Supported by MIT linguist Dr. Suzanne Flynn, this unique approach makes language learning natural and joyful. Even Dr. Noam Chomsky has praised this inspiring program for its remarkable progress.
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2. Anyone Can Speak 7 Languages
by Hippo Family Club

This inspiring collection of essays dives into how both kids and adults can naturally pick up multiple languages through immersion. Packed with heartwarming stories, it offers a glimpse into the innovative methods of LEX / Hippo Family Club.

“Just thinking about it creates a sense of hope, joy, and freshness. I have always had difficulties with language and am intrigued by this approach… Thank you for such an encouraging message.”

– Reader quote

3. A Multilingual Adventure: The LEX Way
By Yuka Fujimura
 
Written by students at the Transnational College of LEX under the pseudonym Yuka Fujimura, this book dives into the fun and philosophy behind LEX / Hippo Family Club’s unique language-learning methods. Through fascinating discussions on history, math, linguistics, and science, it unpacks LEX’s global approach to multilingual immersion. This bilingual (English/Japanese) edition is perfect for anyone curious about learning multiple languages naturally.

“Cracking the Code to Language Acquisition. The book provides historical context and revelations of a unique approach to learning multiple languages simultaneously. I particularly enjoyed the section that explored the similarities, overlap and historical context of Asian languages. The book also describes some of the aha moments in developing a language acquisition program, focusing on a unique pathway that mimics how we learn our first language v. more common approaches such as reading/classroom work. I highly recommend this book for all those interested in a novel approach to language acquisition!”

-Reader quote

4. Multilingual Natural Immersion 
​by Kenshi Suzuki
多言語の音の波に自然に浸ろう: Multilingual Natural Immersion

In this updated guide only available in Japanese, LEX / Hippo President Kenshi Suzuki explores the latest breakthroughs in natural language learning from 2010-2020. Discover the innovative “Munaimmer House” concept, where families use multiple audio speakers to create a multilingual environment at home. Suzuki also shares insights on being multilingual, reflections on his time in New York, and highlights from the Joint Research Project on Multilingualism and the Brain. Plus, dive into his adventures across Mongolia, Kazakhstan, and the Silk Road.

Curious about LEX’s revolutionary approach? This book is your passport to a world of natural, immersive language learning!

5. Who Is Fourier? A Mathematical Adventure
by Transnational College of LEX

With a foreword by Dr. Dan Rockmore, the student authors of the Transnational College of LEX in Tokyo take the reader along on their adventure of discovery of Fourier’s wave analysis. The result is a work that gradually moves from basics to the more complicated mathematics of trigonometry, exponentiation, differentiation and integration, covering Fourier Series, Fourier Coefficients, the Fourier Transform, and the FFT Method. And, most importantly, it’s done in a way that’s easy to understand.

6. What Is Quantum Mechanics? A Physics Adventure
by Transnational College of LEX

Translated by John Nambu with a foreword by Nobel laureate Dr. Yoichiro Nambu, this book continues the approachable style of Who Is Fourier? by offering an engaging exploration of quantum mechanics. It introduces key concepts like the Photoelectric Effect, Compton Effect, Schrödinger’s Equation and the Uncertainty Principle, blending theory with historical context. Readers meet the brilliant minds of Planck, Einstein, Bohr, Heisenberg and more, making this a fascinating guide to quantum mechanics for learners seeking an accessible and inspiring introduction to natural science.

7. What Is DNA? A Biology Adventure
by Transnational College of LEX

This book explores the wonders of molecular biology with humor and vivid illustrations. This engaging book delves into DNA, genetics and evolution, uncovering the secrets of human organisms and language. Perfect for curious minds of all ages, it blends education and fun, drawing readers into a fascinating scientific journey. Discover the rapidly evolving world of biology through the enthusiastic storytelling of these Tokyo-based student authors.

by Clara, LEX Member & Club Facilitator

Language classes are about learning words and phrases. However, in my opinion, LEX is about developing attitudes. Words and phrases are shallow and often are learned in a way that is disconnected from social meaning. Attitudes are very deep – our attitudes affect our thoughts, our emotions, our ability to communicate with others, and our ability to learn. 

LEX has helped me to develop attitudes of acceptance, possibility, fellowship, and joy. And I see other members developing in similar ways.  With an attitude of acceptance, I am comfortable in multicultural environments, and I am comfortable with my attempts to speak a language, which start with approximate sounds and gradually improve. 

With an attitude of possibility, I am not bound by the past or by my expectations. I proceed moment by moment, meeting new people and new languages with an open mind. 

​With an attitude of fellowship, I join with others for a common purpose. Together we can do what none of us could do alone, and very quickly we perceive how our diversity is an asset. ​

With an attitude of joy, magic enters. I believe that joy is at the very center of LEX. That’s why young children are our only teachers—because they still experience so much joy. When we are in a state of joy, we are connected, open to all the possibilities of the universe, able to surpass ourselves. 

​In LEX, we do learn words and phrases. But this happens in an environment of joyful fellowship. It is an outgrowth of our embracing possibilities and accepting each step of a deep journey. LEX is about human connection. Language acquisition is a natural side effect of our desire to be together. ​

by Clara, LEX Member & Club Facilitator​
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Language is often taught as an academic subject, as a set of facts to be mastered. In truth, language is a creative interaction. Speaking and listening are practical, creative skills.  

A speaker reaches out, using their knowledge base, their creativity, and their desire to interact. A listener reaches out, using their knowledge base, their creativity, and their desire to interact. If there is enough overlap, enough of a connection, it is a successful communication.  

Consider this example: Someone says, “Yesterday, I will wash 3 times my teeth and also use the tooth string.” It only takes a little effort and creativity for the listener to understand that,  yesterday, the speaker brushed their teeth 3 times and also flossed, at least once. The original statement has significant issues with verb tense, sentence structure, and word use. But it is understandable if the listener cares to understand. So, should language learning be centered on verb conjugation and vocabulary?  

Under any circumstances, language is approximate. Stop and think for a moment how often misunderstandings arise among people fluent in the same language. Ask a marketing professional, a family counselor, a customer service representative, or a communications expert.  They’ll tell you that a speaker says, “blah blah blah,” and a listener might hear, “bleh bleh bleh.”  It happens all the time. Deals fall through because of it, marriages end because of it, and lawsuits are filed because of it.  

Years ago, I worked as an English tutor in a college tutoring center. We worked with many students who spoke English as a second, third, fourth, or fifth language. We sat at tables in a  large open room. We could often hear each other, and I was sometimes amazed at what other tutors said. They would explain grammar in ways that made no sense to me. And they would define English words in ways that I found very odd.  

All of us tutors were fluent English speakers. In fact, we had excelled in college English courses.  But we sometimes disagreed on the basic features of the English language. The models of English that we carried in our minds varied substantially.  

Even fluent speakers have to communicate across gaps and differences. The speaker reaches out to communicate and the listener reaches out to understand. Both people are actively using logic, creativity, and a desire to interact, and these qualities are intertwined – they cannot be dissected.  That’s why I propose that language is interlogicreativactional.  

Of course, what seems successful will vary according to context. One day, standing at the counter at a Dunkin Donuts, I heard two employees speaking Arabic. I can recognize Arabic, but can only speak a few words. When one of the women handed me my cup of tea, I said,  “Shukran.” Startled, she stopped her rapid motion and looked me in the eye. “Afwan,” she said.  We gazed at each other and so much was communicated in that moment. Two words and a bond grew up between us. 

Does verb conjugation and precise word use matter? Of course it does – in some contexts and at a certain point in development. But not as a first consideration for basic communication. Let’s feel very good about our three words of Mongolian, our few sentences of Portuguese, our halting  Mandarin, our flowing but grammatically atrocious French…In our LEX clubs and exchanges,  we show up with a desire to communicate, and a desire to understand. Those are the most important considerations for basic communication.  

Language uses everything we have as human beings. It is the outgrowth of our hearts, minds, perspectives, and experiences. Each language is the living creation of a people. Indeed, each language is born, evolves, and dies.  

If you kill a butterfly and pin down its body, you can see its anatomy very clearly. But you’ll never sense its motion. What’s different about LEX? What is our contribution? We don’t try to pin down the butterfly. Instead, we gaze in wonder at its flight.