The Best Language Lessons Are the Ones You Get Wrong in Public
A conversation with Boren Scholar Hari on learning Bahasa Indonesia, plus research on how language shapes thought, on why fluency unlocks a completely different trip.

A vocabulary lesson on vacation words. The phrase for amusement park, "taman hiburan," comes out as "teman hiburan," one vowel off, and the sentence suddenly means "friend of amusement" instead. The whole classroom, plus the language school administrator sitting in that day, breaks into laughter trying to figure out what an amusement friend is supposed to be. That single vowel is also, in its own way, exactly how a language actually starts to click.
Language immersion doesn't just help travelers get by. Research on how language shapes cognition shows that different languages structure attention, memory, and even spatial reasoning differently, which means learning to speak a place's language can genuinely change how that place gets experienced, not just how easily it gets navigated.
Choosing a Language for the Wrong Right Reasons
Hari, a Boren Scholar and Gilman Research Scholar studying data science and foreign languages, picked Bahasa Indonesia partly for very practical reasons: no tonal system to master on a tight timeline, and a genuinely unusual linguistic landscape for someone with a background in natural language processing. Indonesia itself surprised him from the start too. Most people default straight to Bali; his own interest ran toward Java, national politics, and Indonesia's outsized role in climate diplomacy as the most mangrove-rich nation on earth. Same country, a completely different entry point.
Bahasa Indonesia itself surprised him on arrival: written in the same Latin script English uses, with grammar that skips the gendered nouns and case systems that make languages like German notoriously difficult. That relative simplicity turned out to matter less than the structure around it. A previous German immersion program, run entirely in the US at Portland State University, delivered a B1 certificate in five to eight weeks through total immersion: a floor of only German-speaking students, German professors, and a hard rule to actually use the language. The Indonesian program went further, adding a host family, daily language partners, and cultural elective classes on top of the classroom hours.

When a Language Actually Clicks
There's rarely one dramatic breakthrough moment. It shows up instead in specific difficult conversations, forced past small talk into real substance: explaining the US electoral college to host parents in Indonesian, a concept plenty of native English speakers struggle to explain in their own language. Something shifts mid-conversation, and words start arriving without translation happening consciously in between.
Kiara's own version of that moment came through something Indonesians call being "kepo," mildly, affectionately nosy: full-speed dinner-table gossip with host parents, not about coursework, but about actual personal life and friend drama back home, fast enough that staff and other students started lingering nearby just to listen. Neither of these breakthroughs happened during a formal lesson. They happened the moment the language became the only tool available for something that actually mattered emotionally.
What Fluency Actually Unlocks
Full professional proficiency in Indonesian opened a door that tourism alone never would have. Staying at a small hotel on Bunaken Island, near a marine national park, a conversation in fluent Indonesian with a staff member who had previously worked for the park turned into something far bigger than small talk: real questions about conservation policy, how the park actually functioned, and eventually a personal tour into the park's internal offices to meet the people who ran it. That access existed because the conversation itself was possible, not because of anything else about the visit.
Research on how language shapes cognition backs up why this goes deeper than convenience. Cognitive scientist Lera Boroditsky's work has found that different languages structure how speakers handle space, time, and even color perception, meaning language isn't simply a tool for description. It actively shapes what gets noticed and how it gets processed. Learning to think, even partially, inside a new language changes what a place actually looks like from the inside.

What Comes Home Too
Some of the most lasting changes weren't about vocabulary at all. Indonesian greeting culture, treating a hello as a genuine, unhurried question rather than a scripted pass-through, became a habit carried straight back to the US: asking better, more specific questions of people, and actually pausing for the real answer. That habit stands out sharply against the default American pace, where "how are you" often functions as a greeting with no expectation of a real response at all, something expats returning home consistently name as one of the harder reverse-culture-shock adjustments.
The Actual Difference Language Makes
None of this required perfect fluency from day one. It required enough commitment to keep making mistakes in public, an amusement park becoming a "friend of amusement," a slightly wrong tone shifting a whole sentence's meaning, until enough of them stopped being embarrassing and started being useful. A phrasebook gets someone through a transaction. A real, if imperfect, grasp of a language gets someone into a national park office, a dinner-table gossip session, a host family's actual daily rhythm. The place doesn't change. What changes is how much of it becomes reachable.

Listen to the full episode
Frequently Asked Questions
Does learning the local language actually change how you experience a place while traveling?
Yes. Beyond practical navigation, research on how language shapes cognition shows that different languages structure attention, memory, and perception differently, meaning genuine language learning can change what a traveler notices and understands about a place, not just how easily they get around it.
How does language immersion differ from casual language learning?
Language immersion programs typically combine structured classes with living arrangements, like host families or language-only dormitories, that require constant real-world use, which tends to accelerate both fluency and cultural understanding far more than app-based or classroom-only study.
Can you achieve real fluency in a language immersion program in just a few weeks?
Some intensive immersion programs can produce meaningful proficiency, such as a B1-level certificate, in five to eight weeks, particularly when the program combines daily classes with a fully immersive living environment that limits use of a learner's native language.
Does speaking the local language actually lead to deeper access and relationships while traveling?
Yes, in practice. Being able to hold a real conversation in a local language can lead to relationships and access, like being invited behind the scenes at a local institution, that would be unlikely to happen through English alone or with only basic phrasebook vocabulary.
What is the relationship between language and thought, according to cognitive science research?
Cognitive science research, including work by linguist Lera Boroditsky, has found that different languages shape how speakers process space, time, and even color, suggesting that language plays an active role in shaping thought and perception rather than simply describing it.