Gen Z Can Spot Marketing Language Instantly. And They Don't Trust It.

Somewhere in a boardroom this quarter, a brand team is debating whether a tagline is “too casual.” They’re asking the wrong question. The one that should actually keep them up at night is whether it’s too forgettable; because for the generation about to become their largest customer base, forgettable is the only sin that matters.

I spent the last several months researching how language moves through Indian advertising, from the Sanskritized "shuddh" Hindi of pre-liberalization copy, through the Hinglish that Millennials made mainstream, to whatever it is Gen Z is speaking now. What I found wasn't a style trend. It was a market structure quietly collapsing, and most marketing departments haven't noticed the load-bearing wall is gone.

The wall was called diglossia, if you want the linguistics term for it: a High register for institutions, and a Low register for everyday life, each staying in its lane. For decades, brands benefited enormously from that arrangement because the generations enforcing it were also the generations spending the money. National campaigns sounded like newsreaders. This wasn’t an accident, formality was doing real work. It signaled that an institution was serious enough to deserve your trust. That equation held for decades because the generations enforcing it — Gen X, older Millennials — were also the generations spending the money.

That equation is now inverting, and the reason is boringly demographic.

Gen Z is on track for roughly $12 trillion in annual global spending power by 2030. More importantly, they are becoming the generation that decides what feels authentic, credible, and worth paying attention to. Trust signals are never universal. They are social conventions. And the convention that formality equals credibility is beginning to age out alongside the generation that built it. Unlike every generation before them, they never signed the contract that says formality equals trust. They grew up watching institutions speak beautifully composed sentences that turned out to mean nothing. To them, the High register doesn’t read as credible. It reads as evasive — the sound of someone about to disappoint you politely.

Here’s the part marketers keep getting backwards: the danger isn’t that formal copy will offend this audience. It won’t. The danger is that it will simply fail to register. Gen Z discovers brands through an infinite scroll of peer-to-peer, meme-literate content, and polished institutional copy doesn’t lose that fight by being disliked, it loses by becoming invisible.

Gen Z discovers brands through an infinite scroll of peer-to-peer, meme-literate content. Polished institutional language doesn't lose that fight by being disliked. It loses by becoming invisible.

You don’t need to be hated to be ignored. You just need to sound like everyone else’s LinkedIn post.

I’ve watched Indian brands respond to this in genuinely different ways, and the differences are instructive. Zomato talks like the friend who’ll guilt-trip you into cooking dinner in the same breath as a joke. CRED proved that wit and premium positioning aren’t opposites — informality doesn’t have to mean cheap. boAt was never translating a formal voice into slang in the first place; the slang is the brand. And HDFC Bank, tellingly, hasn’t abandoned formality at all — it’s segmented it, keeping the High register for regulatory trust while letting its youth products speak an entirely different language. That last example matters most, because it proves this isn’t really about becoming unserious. It’s about being deliberate for the first time about where formality actually earns you anything.

This isn’t an India story dressed up as a global one, either. What's happening in India isn't an isolated linguistic quirk. The same shift is visible in virtually every market where Gen Z is becoming economically significant. Duolingo’s owl mascot runs the exact same play as Zomato — a small team, empowered to move at the speed of culture instead of the speed of an approval chain — and it’s produced some of the most studied brand-voice case studies in the US market. Wendy’s proved a fifty-year-old institution can build a genuinely sarcastic voice from scratch if it commits to the bit. And there are cautionary tales too: plenty of brands have tried to bolt Gen Z slang onto existing copy and been publicly mocked for it, because this generation can tell the difference between fluency and a costume.

But if you want the sharpest possible proof that this isn’t a marketing theory — that it’s a live account of how trust actually gets built now — you don’t need to look at a brand campaign at all. You need to look at a protest.

Earlier this year, a sitting judge in India called unemployed young people “cockroaches.” Within a day, that insult had been reclaimed as a political identity — the Cockroach Janta Party — with a mission statement written entirely in meme register and zero institutional throat-clearing. Within a week it had more followers than parties that have existed for decades. Within two months it had become one of the largest youth mobilizations the country had seen in years, built not on a manifesto but on a joke that refused to die.

What matters here isn't the politics. It's the mechanism. A movement built almost entirely in the Low register generated trust, participation, identity, and collective action without ever passing through the formal language that institutions traditionally rely on to establish legitimacy. 

Marketers may not like the comparison, but they should pay attention to it.

What strikes me most isn’t the scale. It’s the mechanism. This movement’s satire wasn’t detachment for its own sake — the ironic shrug Millennials perfected. It took the establishment’s own language and handed it back as evidence. That’s a rhetorical move with a target, and it’s precisely the register skill brands are going to need as this generation ages into its prime spending years: not fluency in slang, but fluency in meaning it.

Stop Talking Like a Brand. It's Giving 2015.