Sheng: The Language That Makes Nairobi, Nairobi

There is no language quite like Sheng. It did not come from a classroom, a government committee, or a publishing house. It came from the streets of Eastlands — from the crowded estates of Shauri Moyo, Pumwani, and Buru Buru, where children from dozens of different ethnic backgrounds were thrown together and needed a way to talk to each other that was entirely their own.

That was the 1950s and 60s. Today, Sheng is spoken across all of Nairobi, found in government public health campaigns, advertising billboards, rap lyrics, TikTok videos, and political speeches. What started as a secret language of the urban poor has become the most distinctly Kenyan form of communication that exists — and it is still changing faster than any dictionary can keep up with.

If you want to understand Kenya, you need to understand Sheng. And if you want to test how well you understand it, there is no better way than a round of the Slang and Sheng decks in Unajua? — Kenya's #1 party game.

Where Sheng Came From

The word "Sheng" is coined from the two languages it is mainly derived from: Swahili and English. The "h" was included from the middle of "Swahili" because "Seng" would have sounded unusual. The term is first recorded in 1965, originating in the early 1950s in the Eastlands area of Nairobi.

The story behind it is inseparable from the story of Nairobi itself. The racially zoned 1948 colonial master plan divided Nairobi across racialized and class-defined lines — Eastlands was one of the only areas where African Kenyans could live after working in the wealthier parts of the colonial capital. After independence, those same estates became the most densely multicultural neighbourhoods in the country. Kikuyu, Luo, Luhya, Kamba, and dozens of other communities lived side by side, and their children went to the same schools and played in the same streets.

Originally created as a secret language for Kenyan youth growing up in multicultural, multilingual urban environments, Sheng has become widely recognized as a linguistic phenomenon that goes beyond traditional slang. It developed as a way for Kenyan youth to emerge as a unique group within Kenyan society with new modes of interaction and socialization that celebrate the fluidity of culture and identity.

The secrecy was a feature, not a bug. As one early speaker put it: "It's like a code — even your parents don't know what you guys are talking about. It's very secretive. That's the best thing about it." A language that parents could not understand was exactly what young Nairobians needed.

How It Spread

Sheng did not stay in Eastlands for long. It spread the way most things spread in Nairobi — through matatus.

Nairobi's wildly decorated minibuses are more than just moving murals. They are cultural powerhouses, influencing fashion, music, politics, and language. Linguists estimate that a new Sheng word can take as little as two days to travel from a conductor's lips to the rest of Nairobi and beyond.

Music accelerated the process further. Sheng found broad usage among hip hop artists such as Kalamashaka and G.rongi in the African Great Lakes region in the 1990s, whose music helped spread the language and contribute to its rapid growth. Most Sheng words are introduced in various communities and schools and given wide exposure by music artists who include them in their lyrics.

By the 2000s the language had crossed class lines entirely. Today you hear it in Karen and Runda just as much as in Kayole and Mathare. Popular musicians such as Sauti Sol and Khaligraph Jones incorporate Sheng in their lyrics, resonating with younger audiences. Radio stations and TV channels often feature Sheng-speaking presenters to engage with listeners and viewers more effectively. Brands targeting Nairobi's youth market frequently use Sheng in their advertisements to create a relatable and authentic connection.

The Detribalizing Effect

Perhaps the most remarkable thing about Sheng is what it has done to Kenyan identity. In a country with over 40 ethnic groups and a long history of ethnic tension, Sheng operates as neutral ground.

Professor Mungai Mutonya, senior lecturer at Washington University whose research has focused on understanding the social and linguistic changes in densely multilingual African communities, commends Sheng as having a "detribalizing effect." Of those united by the language, he says: "They are not Kikuyus, they're not Luos — they are Nairobians, young Nairobians speaking Sheng."

Research confirms that a significant percentage of Nairobians consider Sheng their first or primary language, and that nearly 60% of those sampled do not speak their presumed mother tongue at home. For millions of Kenyans under 35, Sheng is not a second language. It is home.

Sheng in 2026: TikTok, Gengetone, and the New Frontier

Sheng has always evolved fast, but the pace has accelerated dramatically in the social media era.

The use of social media platforms like TikTok have contributed to the growth of Sheng. Many Gen Z and Millennials easily adapt to other variants of Sheng like Shembeteng, Shengilo and Shengtezo. Each variant carries the fingerprints of a different neighbourhood, campus, or online community.

Gengetone — the Kenyan street music genre that exploded in the late 2010s — injected a new wave of vocabulary into everyday speech. Groups like Ethic Entertainment, Boondocks Gang, and Sailors brought Eastlands slang back to the mainstream and gave a new generation their own lexicon. Much of what young Kenyans say today traces directly back to those songs.

What began as a coded tongue of Nairobi's lower-class youth has, over the decades, evolved into a language that a subset of the youth continually invents and actively uses, while the rest of Kenya eagerly consumes, especially through music. It is now turning into a vernacular, with many born in the 1980s and later speaking it as their first language.

Why Sheng Is Hard to Teach — and Easy to Learn

Every Sheng teacher will tell you the same thing: you cannot learn it from a list. You can memorise words, but without the cultural context — the tone, the timing, the specific way something is said in Kayole versus Kilimani — you will always sound like someone who learned Sheng from a textbook.

The words matter less than the instinct. Knowing when to say something, to whom, and with what energy is the real fluency. That is why Sheng is best learned the way it was invented — through play, through interaction, through being in the room with people who actually speak it.

Which is exactly what the Slang and Sheng decks in Unajua? are designed to test. Not vocabulary. Understanding. The difference between knowing a word and knowing what it means when someone uses it on you.

How deep does your Sheng go?