Learning how to "speak office" once required sitting in an office, watching how a boss crafted an email, noticing when a colleague shifted from a quick chat to a formal request, or deciphering phrases like "run it up the flagpole." That era of informal apprenticeship has largely vanished. Gen Z entered a workforce where much of that learning happens through a screen, and the language on either side of that screen often fails to translate.

Workplace communication has always been about more than just vocabulary. It carries unwritten rules: how to address someone, what belongs in an email versus a Slack message, and how familiar to be with a new coworker. The pandemic and the shift to remote work upended the traditional ways Gen Z absorbed these norms. Social media and instant messaging brought different habits into the office, and AI has "entered the chat" as another tool for learning—or for producing awkwardly templated messages.

The generational language divide goes deeper than whether boomers understand "delulu." The words themselves are evolving, but so are the underlying rules about what sounds appropriate or professional. Gen Z brings terms like "rizz" and "no cap" to work; older workers counter with "blue-sky thinking," "move the needle," and the baffling "boil the ocean." These differences are now so pronounced that Sunny Workplace, a nonprofit employee engagement platform, launched WorkGen Translation, an online tool that decodes slang and jargon across age groups. The company commissioned Censuswide to survey 2,004 U.S. workers on May 25 and 26, split evenly between Gen Z and boomers. Among the 1,002 Gen Z respondents, 80% said generational language differences posed a challenge. Only 30% of the 1,002 boomers agreed. The confusion runs both ways: 76% of boomers had no idea what "delulu" meant, 66% did not know "rizz," and 61% were unfamiliar with "no cap." Meanwhile, only 22% of Gen Z knew exactly what it meant to "boil the ocean," and 25% understood "blue-sky thinking."

Yet the most consequential misunderstandings are often mundane. Betsy Sneller, an assistant professor of sociolinguistics at Michigan State University, pointed to email. "Younger folks entering the workforce don't really have the genre of email in the way that older speakers do," she told Fortune. Older workers treat email as a formal, permanent record, while using platforms like Microsoft Teams for quick exchanges. Younger workers, raised on social media and messaging apps, may not draw that line. They skip formal greetings or punctuation, which can come across as rude to older colleagues. "There can be sort of miscommunication where younger folks are being casual in an email, maybe not using punctuation, maybe not using a formal salutation, and it gets interpreted as very rude by older speakers," Sneller said.

Linguists call this a register mismatch. Renée Blake, an associate professor of linguistics and social and cultural analysis at New York University, explained that people shift their language based on context and audience. Work, home, and social settings each have their own expected register. When students email her with "Hey, Renée" instead of "Good morning, Professor Blake," she sees a collision of expectations. "Am I your friend? I'm not your friend, and you don't know me," Blake said with a laugh. The issue is not that one way is correct and another wrong, but that breaking the expected register can feel like breaking the rules of the space. That can lead to unfair judgments about a person's professionalism.

Iain Smith, head of behavioral science at Sunny Workplace, warned that younger workers who have not yet learned the workplace vernacular risk being judged harshly. "If they speak using phrases like 'delulu' and 'rizz,' for instance, I think there are judgments that can be made about professionalism based on that," he said. He noted that today's rookies no longer sit next to a veteran who shares shortcuts and coping strategies. "They're turning up to Zoom."

The pandemic did not just affect Gen Z. "COVID also stunted all of us," Blake said. "It's not just young people." Workers across generations suddenly communicated from behind screens, and many returned only partially. Blake herself experienced confusion when she moved a class online and tried a more informal tone, only to have students push back: "This is too much, this is too informal. You don't know me." She added, "So this is going the opposite direction."

AI is now part of the negotiation. Blake sees young people using it to learn formal professional communication, but the output can feel stiff and impersonal. Despite these challenges, research suggests generational differences are often overhyped. A meta-analysis in the Journal of Organizational Behavior found few systematic, meaningful differences across generations in workplace outcomes. Smith, a millennial, recalled when his own generation was predicted to ruin the workplace. "From a scientific perspective, there's a lot of research out there that shows that actually generational differences in work values, work-life balance, stress, burnout, working preferences are all overhyped," he said.

Still, Sneller believes the communication styles between new entrants and seasoned workers are more pronounced than in the past, thanks to social media and the pandemic. She sees it in her classroom, where students need more encouragement to talk casually. And the line between the generation that needs translating and the one doing the translating shifts quickly. Sunny's survey asked about Gen Alpha slang: 41% of Gen Z did not know what "Ohio" meant, and 75% did not fully understand or would not use "skibidi." Gen Z may not have to wait until middle age to wonder what the kids are saying—they may just have to wait for Gen Alpha to clock in.