The Impact of Kenyan Radio on Sheng and Language Evolution

Julius Owino — known to most of Nairobi as Maji Maji, the managing director of Ghetto Radio 89.5 FM — said something in a 2013 interview that I have never been able to shake. "We were the first ones to dare broadcast in Sheng and accept the slang," he told journalists. "Now even official cooperative advertisements and brand communication are in Sheng." He said it with the matter-of-factness of someone stating a weather report. But what he was describing was nothing short of a linguistic revolution — one that had unfolded on the airwaves, in matatus, on playground fences, and inside the kitchens of Eastlands flats for three decades before anyone in a government office would admit it was happening at all.

I grew up in Ruiru, on the edge of Nairobi's satellite orbit, and Sheng was not something I was taught. It was something I absorbed — through older cousins who had come up in Mathare, through the matatu conductors who spat it like percussion, and above all, through the radio. Specifically, through the morning hours of Ghetto Radio, which reached our estate on 89.5 FM with a clarity that seemed to say: this language is yours, and it belongs on the airwaves too. I was, perhaps, twelve. I did not yet have the vocabulary to understand what was being legitimated. But I felt it in my chest, the way you feel something that names you before you can name it yourself.

This essay is about that legitimation — how it happened, what radio did to accelerate it, and what we stand to lose if we are not honest about the fracture at the heart of how Kenyan institutions still treat the language most young Kenyans actually speak.

Before the Dial Opened: The Colonial Silence and What Filled It

To understand what radio did for Sheng, you first have to understand what radio was before Sheng entered it.

For most of Kenya's post-independence history, the Kenya Broadcasting Corporation (KBC) held a monopoly on the airwaves. Its Radio Taifa broadcast in Swahili from 1953. Its English Service traced its roots to 1924. The political logic was standardisation — a unified national tongue, tethered to the two official languages, English and Swahili, that the state could control and the Kenya Institute of Curriculum Development could examine. What was happening in the streets, in Mathare and Korogocho and Kibera, was simply not radio's problem.

Sheng, meanwhile, was being born in those same streets. Linguists trace its origins to the 1970s and early 1980s, when a massive rural-to-urban migration packed young people from across Kenya's forty-plus ethnic communities into the crowded rental rows of Nairobi's eastside. Luo, Kikuyu, Kamba, Luhya — all these languages pressing against each other in the same compounds and school playgrounds, with Swahili as the grammar that held them together and English as the aspirational layer on top. The youth needed a code that was theirs alone, a way of speaking that kept secrets from parents and police alike. Words that described bhang or law enforcement were the ones that cycled fastest; the moment the older generation cracked the code, the code changed.

The word "Kosovo," meaning a dangerous place. "Rwanda," meaning to beat someone up, born from the darkest news of 1994. "Chappa" for money. "Moti" for a car. A living, mutating lexicon that linguists, decades later, would call perhaps the most dynamic language on earth — and one that radio, for a long time, pretended did not exist.

In 1995, Capital FM 98.4 became Kenya's first private FM station, founded under a broadcasting liberalisation that had been building since the state licensed KTN in late 1989. In 1996, KBC launched Metro FM. Patrick Quarcoo came from Uganda, invested in Kenya's nascent media scene, and built what would become Radio Africa Group — eventually owning Kiss 100, Classic 105, Radio Jambo, and several others. The explosion of FM stations was real and rapid. But these were, in the main, stations aimed at Kenya's aspirational middle class: English-heavy, professionally scripted, and located in a linguistic register that Eastlands residents heard as coming from somewhere else. Someone else's Nairobi.

2007: The Frequency That Changed Everything

When Ghetto Radio 89.5 FM launched in 2007 — owned by Nairobi lawyer Maria Mbeneka, wife of former Laikipia governor Ndiritu Muriithi, and run by Julius Owino — it did something that sounded simple but was, in practice, a provocation: it broadcast exclusively in Sheng. Not Sheng as a stylistic seasoning over standard Swahili or English. Not Sheng as a comedic register for skits. Sheng as the primary, unapologetic language of news, sport, opinion, music, and life.

The station called itself "the voice of the youth" and "your official Sheng station." It talked about the things that its core listeners — young people aged fifteen to twenty-five from Nairobi's informal settlements — actually lived with: crime, unemployment, early marriage, child labour, police violence. Presenters like Bonoko (James Kang'ethe), who had grown up on the streets of the city after fleeing domestic upheaval in Kiambu as a four-year-old, brought something no script could manufacture: they spoke the way their audience spoke because they had grown up in the same world. Bonoko didn't learn Sheng for the job. He arrived with it already in him.

By 2012, Ghetto Radio had a monthly listenership of approximately 1.2 million. It was Nairobi's second most popular station on Tuesday and Friday afternoons. That is not a niche figure. That is a language demanding to be taken seriously.

The station introduced a segment called "Update Your Slang" in its morning show. The premise was straightforward: bring in new Sheng words from around the city, explain them, and circulate them. But what it functioned as was something far more consequential than a curiosity slot. It was an act of deliberate linguistic archaeology and simultaneous standardisation — the station reaching into the streets of Kayole and Dandora and Embakasi, harvesting new coinages before they faded, and broadcasting them back across the city. In doing so, it was performing the function that academic language institutions, including the Kenya Institute of Curriculum Development, had refused to perform: documenting and disseminating a living language in real time.

The same year Ghetto Radio launched, Pamoja FM 99.9 went on air in Kibera — formed, according to its own founding language, "to empower the youth of Kibera and its environs through education, information, and entertainment." Pamoja FM's story is more intensely political. During the post-election violence of 2008, a mob approached the tall building in Kibera where the station broadcast from its top floor, ready to burn it down. The then-twenty-three-year-old station manager, Antony Nyandiek, told them the station belonged to all of them. They turned and went elsewhere. A community radio station in Sheng, broadcasting about and from Kibera, had become the one thing in that building worth saving.

The Standardisation Trap: What Radio Gives and What It Takes

Here is where I have to be honest about the fracture — because radio's relationship with Sheng is not a simple celebration.

Sheng's vitality has always come from its refusal to be fixed. Professor Mungai Mutonya of Northwestern University, one of the language's most serious academic observers, has described it as defined by its speed: the words that describe illegal substances or police are the ones that change fastest, because the moment the code is cracked, a new one is invented. Linguist Chege Githiora, writing in the Journal of African Cultural Studies in 2018, documented Sheng's "expanding domains" — its spread from youth code into media, politics, education, and corporate advertising — but noted that this expansion carries a risk: the language that makes it onto radio is not quite the same language that lives in the street.

By broadcasting Sheng, Ghetto Radio was simultaneously legitimating it and beginning to standardise it. "Update Your Slang" is an act of love, but it is also an act of selection — some words make it to air, others don't. The Sheng of Kawangware is not the same as the Sheng of Kayole; the Sheng of Mombasa Road barely resembles the Sheng of Githurai. When a radio station with 1.2 million monthly listeners decides which version of Sheng is the version, it is exercising linguistic power whether it intends to or not.

This is not an argument against Ghetto Radio. It is an argument for intellectual honesty about what legitimation costs. The Landless Workers' Movement in Brazil, studying which Paulo Freire studied, understood this: to bring a people's language into official or semi-official spaces is to begin reshaping it. The question is whether that reshaping is done with the people, or to them.

What Ghetto Radio got right — and what distinguishes it from, say, a corporation cynically embedding Sheng in an advertisement — is that its presenters were not translating from outside the community inward. James Kang'ethe did not learn Sheng to perform it. Bonoko was formed by the same streets his listeners came from. That is a different thing entirely.

Mainstream Capture: When Capital FM Discovers Sheng

There is a particular discomfort I feel every time I hear a polished Kiss 100 presenter slide a Sheng phrase into a corporate advertisement. Not because language shouldn't travel — it always travels — but because of how carefully selective that travel tends to be.

By the time Capital FM 98.4 and Kiss 100 were incorporating Sheng elements into their programming, they were doing so at the pressure of advertisers, not at the pressure of the communities that had built the language. A 2017 academic study documented that Sheng had, by that point, "greatly spread in urban centers like a bush fire" — and that companies had adjusted their marketing strategies accordingly, particularly for products targeting youth. In 2005, a government HIV/AIDS campaign had already pioneered this calculation: advertisements discussing sex ran in Sheng on billboards and radio precisely because the language allowed the message to reach young people while sliding past the disapproval of older Kenyans who would have objected to explicit public health messaging in English.

Sheng as a vehicle for product placement is not the same thing as Sheng as a vehicle for community self-expression. One is extraction; the other is cultivation. And the institutions doing the extracting — Radio Africa Group's stations, mainstream commercial broadcasters, advertisers from Nairobi's corporate belt — are largely not answerable to Mathare or Kibera or Kawangware in any structural way. They take what is useful and leave the rest.

The split here is not unique to Kenya. It is the old argument between community media and commercial media, between a language that belongs to its speakers and a language that gets borrowed by whoever can profit from it. What makes it especially sharp in the Sheng context is that the language was built precisely as a code — built to exclude those who hadn't earned the right to it. Radio's broadening of that code is both its greatest contribution and its most complicated intrusion.

What the Language Is Doing That Radio Cannot Control

The thing that reassures me, in the end, is that Sheng has always been faster than any institution trying to manage it.

The words "ashara" (ten shillings), "jongo" (a shilling), "moti" (a car), "wagido" (a dog) — favourites of an earlier era, now faded and forgotten. The Sheng that was broadcast on Ghetto Radio in 2009 is not the Sheng being coined in Huruma in 2025. The language doesn't wait for the radio segment to confirm it. It moves through WhatsApp groups and school corridors and football terraces and market stalls faster than any broadcaster can track. In this sense, Sheng is its own most reliable guardian.

What radio has done — and this is not a small thing — is given the language a record. Before Ghetto Radio, there was no institution systematically collecting, archiving, and broadcasting the Sheng of any given moment. The Shujaaz.FM platform, launched in February 2010 by Well Told Story Company as a multimedia project combining free comic books with syndicated FM radio programmes, tried to do something similar — using Sheng as its primary medium to reach young Kenyans on economic opportunity, livelihoods, and social change. Its central character was, deliberately, an anonymous pirate radio DJ. The choice was not accidental. The pirate broadcaster — the voice operating outside official channels, in a frequency the state did not sanction — was already the mythological figure around which Sheng culture had organised itself.

Radio did not create that myth. But it gave it a legal address.

The Unfinished Argument: Official Status and the Schools

There is one fracture that radio, for all its reach, cannot close on its own.

In Kenyan schools, Sheng remains a problem to be disciplined rather than a resource to be developed. Eunice Mlati, a head teacher at Moi Avenue Primary School, articulated the position that most school administrators hold: the language is an obstacle to teaching the next generation of Kenyans. This view is institutionally dominant. The Kenya Institute of Curriculum Development has not incorporated Sheng into any formal curriculum. Despite a 2006 announcement by the Kenyan Publishers Association that it would publish books in Sheng, only Well Told Story's Shujaaz.FM booklets have followed through. A 2024 academic paper in the Journal of Education and Practice recommended, cautiously, that Sheng "be considered as an independent language code in the country" — but that recommendation has the quality of a whisper into a government corridor that has heard louder voices and chosen not to act.

The state's relationship with Sheng has always been one of strategic use: Sheng for the HIV/AIDS billboard, Sheng for the youth vote, Sheng for the advertiser who wants to seem relatable. But Sheng in the school, Sheng in the official record, Sheng as a language that the Kenya National Examinations Council acknowledges — that remains, as of now, too far.

This is the limit of what radio can do. Ghetto Radio can legitimate Sheng in the living room and the matatu and the construction site. It cannot legitimate it in Form Two English class. For that, a different kind of institution would have to make a different kind of decision — one that requires admitting that what most young Kenyans speak has value not despite its origins in the streets of Mathare, but because of them.

The Language Belongs to Those Who Built It

I come back, always, to what Maji Maji said. "We were the first ones to dare." The word "dare" is important. It acknowledges that there was risk — that to broadcast in Sheng, in 2007, was to claim space for a language that official Kenya did not recognise. It acknowledges that legitimation is not free. Someone has to go first.

Ghetto Radio went first. Pamoja FM went first in Kibera. And the communities that had been building and rebuilding and rebuilding Sheng since the 1970s — the young people in the crowded rental rows who needed a code their parents couldn't crack, the street children who found in a shared language the only form of ownership they could have — they had been going first for decades before the dial opened.

Kenya's linguistic story is not finished. The argument about whether Sheng is a slang, a dialect, a creole, or a fully-fledged language has not been settled — linguists like Chege Githiora and Mungai Mutonya are still debating the grammar and the sociology of it simultaneously. The argument about whether the schools should teach it, whether the government should recognise it, whether its march across East Africa into Tanzania and Uganda and beyond makes it something new entirely — these arguments are very much alive.

What radio did was make those arguments impossible to avoid. Before Ghetto Radio, you could claim that Sheng was a passing youth phase, a street affectation that would fade as its speakers grew up and adjusted to official linguistic norms. After 1.2 million monthly listeners, after "Update Your Slang," after Bonoko's voice filling the matatus of Eastlands every morning — that claim became untenable.

The language is here. It was always here. The radio simply turned up the volume until the rest of Kenya had no choice but to listen.