The universal language

"OK" is the most frequently spoken word on the planet, and these 9 follow

Learning languages is hard. But, fortunately, some terms rooted in daily universal experiences don't change much when crossing borders. If you say "mama, "papa," "taxi," or "banana," anywhere in the world, they’ll recognize those nouns immediately —even if the context provided is entirely blurry. The question is: Why did these words barely change over time and across different languages? Let’s explore the stories behind the most spoken words on the planet.

"OK" is the most spoken word on the planet. And it started as a typo joke. In 1839, the initials "O.K." were first published in the Boston Morning Post, meant as an abbreviation for "oll korrect" — a popular slang misspelling of "all correct."

Following that gag, politics intervened. In 1840, President Martin Van Buren's reelection supporters formed "O.K. Clubs" across the country, since Van Buren was nicknamed "Old Kinderhook" after his hometown in upstate New York. From there, telegraphs carried it coast to coast, and eventually it spread from North America all the way to the Moon, where Buzz Aldrin spoke it after the Apollo 11 landing.

Is it a real word? According to science, it is. In 2013, researchers at the Max Planck Institute for Psycholinguistics investigated "huh?" in naturally occurring conversations across ten languages and presented evidence for two claims. One, the term is universal. Two, it is genuinely a word.

They later expanded the study to 31 spoken languages from around the world and found that all of them have a word with a nearly identical sound and function as the English "huh?" With all its nuances and differences, most human languages on Earth independently arrived at similar rising syllables for not understanding something in conversation.

Why do unrelated languages, spoken by people who never met, use almost identical words for "mother" and "father"? In Swahili: mama. In Polish: mama. In Mandarin Chinese: māma. In Quechua, spoken in the Andes of South America: mama. This mystery puzzled linguists for generations.

This isn’t a case of cognates (words borrowed from one language to another). The answer here lies in babies: "mama" and "papa" are among the easiest sounds to produce, because they combine bilabial consonants and open vowels. "Mmm" is often the first consonant babies experiment with.

The term "hello" had floated around English since the 1820s, mainly as a shout to get someone’s attention, like "hey" or "oi." But it was barely more than that before telephones existed.

Then, in 1876, Alexander Graham Bell invented the telephone, and it was time to decide what callers should say when they picked up. Bell himself suggested the traditional nautical hail, "Ahoy." It was Thomas Edison who suggested "Hello!" in a letter dated 1877. By 1889, telephone operators had become widely known as "hello-girls." By then, the greeting had jumped to everyday conversation, and eventually every language on Earth picked up a version of it.

It is said that "Coca-Cola" is one of the most recognizable terms on the entire planet, much like the word "OK." This makes sense: the soft drink is sold in more than 200 countries. The name wasn’t the result of a marketing team or a focus group. It was coined in 1886 by the company’s bookkeeper, Frank M. Robinson, who derived it from the drink's two original ingredients: coca leaf and kola nut.

The drink was invented in Atlanta, Georgia, in 1886 by Dr. John S. Pemberton, who originally marketed it as a medicinal tonic. Today, approximately 1.9 billion servings of Coca-Cola beverages are consumed each day, so wherever in the world you are, the brand needs absolutely no introduction.

The word "coffee" has traveled far. Its story starts in the Ethiopian highlands with a by-now popular legend that depicts a 9th-century goat herder who noticed his goats wouldn’t sleep after eating berries from a certain bush. Thus, the idea of the drink made from those berries spread in Ethiopia.

From there, it moved to Yemen, where it was documented in a 15th-century text as a drink made from roasted coffee beans. It was assigned the Arabic word qahwa, which traveled with the drink. The product was traded by the Ottomans, who influenced several other languages, and from it derived the Italian caffè, the Dutch koffie, and the French café. So, the term has mutated slightly in each language, but it remains similar enough to identify it easily all over the world.

Every night, hundreds of millions of people all over the world put on a Persian garment with a Persian name. The word "pajamas" comes from the Persian pay-jāma, a compound of pay (foot or leg) and jāma (garment). In 15th-century Persia, it referred to loose trousers worn by men and women for comfort, and the term entered English in the 18th century when British colonists encountered the garment in India.

But the original pajamas were not sleepwear for a long time. Victorian high society adopted them as fashionable, exotic loungewear, and it was by the early 20th century that the two-piece sleeping suit had spread across the Western world. Today, most countries in the world have very similar names for this garment.

"Safari" is the name for a very specific activity. For many tongues in the world, the word itself conjures jeeps, binoculars, lions, and zebras.

But its original meaning was distant from the current one. It comes from the Arabic safara, which means "to travel." In Swahili, safari simply means any kind of journey, not just a wildlife expedition. For the English language, it was first recorded by explorer Sir Richard Francis Burton in the Journal of the Royal Geographical Society in 1859. British colonists in East Africa understood the word to apply to hunting expeditions, and, by the middle of the 20th century, Hollywood had cemented its modern image with films romanticizing the African bush.

Today, Apple’s decision to name its search engine "Safari" brings the term closer to its original meaning than to the one related to wildlife exploration.

Banana is one of the most consumed fruits on Earth, and its name has traveled with it. The word "banana" first appeared in English in the 1590s, borrowed by Spanish or Portuguese explorers from a West African word, possibly from the Wolof language, spoken in what is today Senegal and Gambia.

Most historians sustain that Africans began harvesting the fruit at least 4,500 years ago. When Portuguese and Spanish ships began trading across the world in the 15th and 16th centuries, they encountered the fruit, borrowed its African name, and carried both across the Atlantic. Today, the word sounds remarkably similar in many languages: banana in English, Spanish, Italian, and German; banane in French; 바나나 (banana) in Korean.

From Buenos Aires to Bangkok, you can step off a plane having never spoken a word of the local language, hold out your hand, and say one word: "Taxi." You will get the exact same thing. But the story of this two-syllable word is a tangle of countries and languages.

The original word was "taximeter," coined by German inventor Friedrich W. G. Bruhn in 1891. This was a device that measured the fare by distance. It was the French who shortened taximètre to taxi. A company imported them to New York under the market name "Taxicab" and decided to paint them yellow, since it was the most visible color. From there, both the short name and the iconic color stuck. Today, it is a symbol universally shared that you’ll find in every major city.

Facts you didn't know you needed

Is the day longer for your pet? Mind-blowing facts you need to know

Adults often assume they already understand the world, but there’s always something new to surprise us! Did you know that clouds actually have weight? Or that the day is longer for some animals? And that’s just the beginning. From hidden functions of your organs to the true color of the universe, today you’ll learn 10 fascinating facts you probably never thought to ask, but will make you sound impressively smart in your next conversation!

Unlike humans, animals don’t experience a shared "present" in quite the same way. Instead, their sense of time is tied to the rhythms of their own bodies. For very small animals with fast metabolisms like parrots, hamsters, or guinea pigs, time actually seems to pass more slowly. In a sense, they live in slow motion because their faster-working nervous systems allow them to process sensory information at a fast speed.

What if someone commits a crime and tries to blame their identical twin? Have you ever wondered about that? It’s a valid question; after all, identical twins not only look alike, they also share the same DNA. But here’s the surprising part: if investigators check fingerprints, the innocent twin could be cleared. That’s because, despite their nearly identical DNA, twins have unique fingerprints, shaped by subtle genetic and environmental factors in the womb.

You’ve probably spent time lying on the grass, watching clouds drift across the sky. They look light, fluffy, almost like cotton candy, and it’s hard to imagine them as heavy objects. But the truth is surprising: clouds are incredibly heavy. An average cumulus cloud can weigh around 1 million pounds! That impressive weight comes from the billions of tiny water droplets suspended in the air. So, how do they float? It’s because each droplet is extremely small and falls very slowly, while rising warm air currents help keep the cloud suspended above us.

Most of us have a rough image of the world map in our minds. But we have something to tell you: most maps aren’t completely accurate. Because the Earth is a sphere, cartographers have to distort some areas to represent it on a flat surface. On Mercator projection maps, countries near the poles appear much larger than they really are, while countries near the equator look smaller in comparison. For example, Alaska looks about the same size as Brazil, but in reality, Brazil is nearly five times larger!

Most people don’t realize that there’s actually a name for the color of the universe. Strange, right? But it’s true! Astronomers who studied the light from thousands of galaxies discovered that if you blend all the colors from the observable universe, the result is a soft, beige-ish white shade, famously named "Cosmic Latte" in 2002.

With 50 states, there’s no shortage of variety in their names. Almost every letter of the English alphabet appears at least once, except for one: Q, which is completely absent. In addition to this, there’s another surprisingly rare letter: J. While it isn’t entirely missing like Q, it only appears in one state, New Jersey.

Although we don’t notice it, indeed, the Earth’s rotation is gradually slowing. This happens because tidal friction, caused by the Moon’s gravitational pull on our oceans, creates a subtle drag on the planet’s spin. As a result, days are getting longer, but very gradually: by only about 1.7 milliseconds per century.

Do you remember your last dream? Whether good or bad, dreams are a constant part of sleep, but not everyone experiences them in the same way. Deaf people who use sign language in their daily lives often communicate through signs in their dreams, too. Meanwhile, blind people tend to have dreams rich in sounds, smells, and tactile sensations, using these other senses to experience the dream world.

We’re used to seeing hippos covered in mud, splashing in water, or barely peeking above the surface. But here’s a surprise: hippos can’t actually swim! That’s right. Because of their huge, heavy bodies, they don’t float or paddle like most animals. Instead, they walk or run along the riverbed.

Can your brain really "eat" itself? Well, close, but not exactly. There’s a process called phagocytosis, carried out by specialized immune cells in the brain known as microglia. These cells engulf and remove debris, dead cells, and other unwanted material. But don’t worry; it’s safe! The mechanisms exist to protect, repair, and maintain your brain.