Language feels ordinary because we use it all day. Yet it's one of the strangest things humans do: we push air out of our mouths, shape it into sound, and someone else's brain turns those vibrations into meaning. That's how a thought can jump from one mind to another, across a room, across years, even across continents.
It also means a new idea can be planted almost instantly. For example: imagine a jellyfish dancing in a bookstore while you think about quantum mechanics. If that image wasn't in your head a moment ago, it is now.
Cognitive scientist Lera Boroditsky asks a simple question with big stakes: with roughly 7,000 languages spoken around the world, do the different words and structures people use change how they think? History pulls both ways, from Charlemagne's "a second language is like a second soul" to Shakespeare's reminder that a rose smells the same no matter what you call it. Boroditsky's point is that modern research can finally test this instead of only debating it.
From philosophy to evidence: what researchers can test now
For a long time, the idea that language shapes thought sounded slippery. How do you prove what's happening inside someone's head? The shift Boroditsky describes is practical: researchers can design experiments that compare what people notice, remember, and do when their languages require different kinds of information.
Here are a few places where language differences show up in measurable ways:
- Space and navigation: How you describe location can train your sense of direction.
- Time: People may organize timelines in space differently depending on language habits.
- Numbers: If a language doesn't name exact quantities, exact counting becomes harder.
- Color: Color categories can affect how quickly people spot differences.
- Grammar: Features like grammatical gender can subtly steer descriptions.
- Events and blame: Some languages push speakers to name an agent ("he did it"), others don't.
Boroditsky ties these together with a bigger takeaway about human minds:
Linguistic diversity shows how flexible the human mind is, because people can build many different "default settings" for attention, memory, and perception.
If you want the long form of her argument in print, this Scientific American article on how language shapes thought covers the same core theme in a different format.
The Kuuk Thaayorre and a world without "left" and "right"
One of Boroditsky's most memorable examples comes from an Aboriginal community in Australia: the Kuuk Thaayorre people in Pormpuraaw, on the western edge of Cape York. Their language doesn't rely on "left" and "right" the way American English does. Instead, it uses cardinal directions for everyday life: north, south, east, west (and combinations like north-northeast).
That difference sounds small until you picture what it means in practice. Instead of saying, "There's an ant on your left foot," a speaker might say, "There's an ant on the southwest of your foot." Instead of "Move your cup a little to the right," it's "Move your cup to the north-northeast."
Even greetings can reflect this orientation habit. Boroditsky describes a version of "hello" that functions more like, "Which way are you going?" and the answer is expected to be a direction.
So what happens when a language forces this kind of precision? People get very good at staying oriented, because they can't speak naturally without knowing where they are in space. In other words, the language constantly nudges attention toward the environment.
Boroditsky drives the point home with a simple test: close your eyes and point southeast. In a typical room of English speakers, arms point all over the place, because many people don't track cardinal direction moment to moment. In the Kuuk Thaayorre community, even young kids can often do it.
The lesson isn't that one group is "smarter." It's that daily linguistic habits train skills. Culture and language can build a mind that treats direction like background awareness, the way many Americans treat "left" and "right" as automatic.
For a written version of this talk that's easy to reference, see a TED Talk transcript of Boroditsky's talk.
How Kuuk Thaayorre speakers map time onto the landscape
Once you stop anchoring space to the body (left and right), time can shift too.
Boroditsky uses a simple exercise: show people photos of someone at different ages and ask them to arrange the pictures from earliest to latest. Many English speakers lay them out left to right, which matches English reading direction. Hebrew or Arabic speakers often reverse that arrangement.
Kuuk Thaayorre speakers do something different. They arrange time based on east and west, following the sun's path across the sky. As a result, the "earlier to later" direction changes depending on which way a person is facing.
A quick way to summarize the pattern she describes:
- Facing south: the timeline runs left to right.
- Facing north: the timeline runs right to left.
- Facing west: time runs toward the body.
The key point is that time isn't anchored to "me" (my left, my right). It's anchored to the physical world. When you turn your body, the timeline rotates with the terrain, not with your personal viewpoint. That is a radically different default for something as basic as "past" and "future."
When a language doesn't name numbers, exact counting gets harder
Another example sounds almost too familiar to notice. Imagine you see a photo with several penguins and someone asks, "How many are there?" Many English speakers solve it the same way: point mentally to each penguin and count, "one, two, three…" The final number word becomes the total.
Boroditsky calls this a kind of cognitive trick, learned early and reinforced constantly. It feels natural because English makes it easy to practice. The important twist is that not all languages have a full set of number words. Some languages don't have specific words for "seven" or "eight," and some don't use exact-number naming in the same way English does.
In those cases, speakers may not rely on counting for exact quantities, and they can struggle to hold an exact amount in mind when tested. So a task that feels simple to an English speaker, matching the number of penguins to the number of ducks by counting each set, becomes much harder without the language habit of exact counting.
This matters beyond party tricks. Boroditsky's point is structural: having number words supports access to the larger world of math. Without the basic tool of counting, algebra and higher math become difficult to build, because the foundation is missing.
That doesn't mean people without these number systems can't reason or solve problems. It means the language toolset changes which kinds of exact, abstract quantity work become "easy by default."
Color words and faster perception: the Russian "blues" effect
Color seems like pure vision, not language. You see what you see, right? Boroditsky highlights research suggesting language still sneaks in, even at this basic level.
In English, "blue" covers a wide range of shades. Russian commonly splits that range into two basic categories, with separate words for light blue (goluboy) and dark blue (siniy). Because speakers use these categories constantly, they practice making that boundary in daily life.
When researchers test color discrimination, Russian speakers tend to spot the difference between these two blues faster than English speakers do, especially when the shades fall on opposite sides of the named boundary.
Boroditsky also describes brain responses that match the idea: when a person has two well-practiced categories, the shift from one to the other can register as "something changed in category," not just "something changed a little."
If you want to see a widely cited study connected to this topic, the paper Russian blues reveal effects of language on color discrimination is a useful reference point.
What's striking here is the scale of the effect. These are quick, simple decisions, the kind you make all day without thinking. Yet the categories your language trains can still change speed and attention at that level.
Grammatical gender can shape descriptions of the same object
Some languages assign grammatical gender to nouns, often masculine or feminine. The genders aren't universal across languages, which creates a natural test: if grammar is "just grammar," descriptions shouldn't shift much. If grammar shapes habits of thought, patterns might appear.
Boroditsky shares an example involving German and Spanish. In German, "sun" is grammatically feminine and "moon" is masculine, while Spanish reverses that. Then she points to a specific object used in research prompts: a bridge.
In German, the word for bridge is feminine; in Spanish, it's masculine. When asked to describe a bridge, German speakers tend to choose adjectives that translate to more stereotypically feminine traits (like "beautiful" or "elegant"), while Spanish speakers lean more toward stereotypically masculine traits (like "strong" or "long").
Here's the core comparison in a simple view:
| Language | Grammatical gender of "bridge" | More common description style in the example |
|---|---|---|
| German | Feminine | "Beautiful," "elegant" |
| Spanish | Masculine | "Strong," "long" |
The takeaway isn't that speakers believe bridges have a biological sex. It's that grammar creates a constant nudge, so certain associations get rehearsed more often than others.
For readers who want a research-oriented source tied to Boroditsky's work on gender and language, this Stanford-hosted paper, Sex, Syntax, and Semantics, is a helpful starting point.
"He broke the vase" vs. "the vase broke": language, blame, and memory
Some of the most personal consequences show up when language pushes speakers to describe events in different ways.
In English, it's common to say, "He broke the vase," even if it was accidental. English also allows odd phrases like "I broke my arm," even when the speaker clearly didn't mean to. Other languages often prefer constructions closer to, "The vase broke," or "The vase broke itself," especially for accidents.
That difference changes what speakers pay attention to while watching the same scene. Boroditsky describes a pattern:
- English speakers are more likely to remember who caused an accident, because the language keeps bringing the agent to the front.
- Speakers of languages that avoid naming an agent for accidents may be more likely to remember that it was accidental and focus on the result.
Two people can watch the same event and later report it differently, not because one is lying, but because their language trained them to package the event differently.
This has real-world implications. Eyewitness testimony can get messy when memory highlights different details depending on a person's language habits. Even moral judgment can shift. If you frame an event with an agent ("He broke the vase"), listeners tend to assign more blame than if you frame it as a happening ("The vase broke").
If you want a related interview that expands on these kinds of everyday effects, NPR's segment Language informs how we think about the world covers Boroditsky's ideas in a conversational format.
Why losing languages means losing knowledge about the mind
Boroditsky ends with a point that's easy to miss: linguistic diversity isn't just a cultural treasure. It's also a scientific resource. Each language offers a different set of mental habits, a different "default" for what speakers track, encode, and remember.
Yet that diversity is shrinking. She notes a stark statistic: the world is losing about one language per week, and some estimates suggest half of the world's languages could disappear within the next 100 years.
There's also a research problem. Much of what science claims to know about how humans think comes from studies on a narrow slice of people, often English-speaking American college students. That leaves huge gaps. If language can shift attention, time mapping, memory, and perception, then a science of the mind based mostly on one language group will miss a lot.
A good companion resource for educators and learners is TED-Ed's lesson page, How language shapes the way we think, which organizes the talk with questions and extra context.
For more talks in the same spirit, browse the main TED Talks library, where topics like language, culture, and cognition often intersect.
Final thoughts: notice the language habits inside your own head
The biggest twist in Boroditsky's message is that this isn't only about "other languages." It's about the invisible habits in the language you already speak, and how those habits steer what you notice and remember. Once you see that, you can start asking a sharper set of questions: why do I think the way I think, and what might change if I learned a new way to say the same things?
If this topic sticks with you, it's worth following TED for more talks and interviews, whether on TED's YouTube channel, TED on Twitter, or TED on Facebook.
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