When Attorney Ken Duong first moved to Vietnam, he quickly fell in love with the rhythm of daily life, especially through Vietnamese food. Almost every afternoon, he would sit down with his Vietnamese friends for cơm tấm, the iconic broken rice dish topped with a sunny-side-up egg, grilled pork, and fish sauce. Like much of Vietnam culture, the meal was simple, balanced, and deeply social.

When the bill came, he did what many foreigners instinctively do. He suggested splitting it at the table. The reaction was subtle but clear. A few awkward smiles. A pause in the conversation. It felt as though he had crossed an invisible line. Curious, Attorney Ken Duong asked a local friend whether there was a specific rule in Vietnam about paying at restaurants. The answer was no. There was no written rule and no official law about it. Reassured, he continued splitting the bill at the table. Yet the uncomfortable looks persisted.

Later, he discovered the missing piece through discussions with other expats and locals. In many social settings in Vietnam, especially when sharing Vietnamese food among friends or colleagues, one person typically pays the entire bill first. Afterward, the others transfer their share digitally or hand over cash privately. What is generally avoided is dividing the bill openly at the table.

This practice is not a formal regulation. It is an unwritten social norm within Vietnam culture. Many Vietnamese people would not even think to explain it because, to them, it is simply common courtesy. Publicly calculating and separating payment can feel transactional and disrupt the harmony of the meal.

That early experience taught Attorney Ken Duong an important lesson about living among Vietnamese people. The most significant cultural differences are often unspoken. They are learned through observation rather than instruction.

Of course, some rules in Vietnam are explicit and enforced by law. Public nudity, for example, is illegal. There was a widely reported case of a foreign woman walking naked along a main road in Nha Trang, apparently treating it as if it were a beach setting. Situations like that are not matters of etiquette. They are clear legal violations.

Most cultural missteps, however, are far more subtle. They occur at the dinner table, in cafés, or during everyday interactions.

Last year, Attorney Ken Duong and his team released a video outlining ten actions that are illegal in Vietnam. With the increasing number of tourists and expats relocating to the country, they received many questions about social norms, especially regarding tipping, dining customs, and everyday etiquette. Many visitors express a desire not to appear out of place. While there is nothing wrong with being a tourist, understanding local habits can make the experience more respectful, more seamless, and often more affordable.

Vietnamese food is more than sustenance. It reflects the values of Vietnamese people and the broader framework of Vietnam culture, where harmony, respect, and subtlety shape daily life.

In this article, Attorney Ken Duong shares ten unspoken rules that tourists and expats frequently overlook in Vietnam. These are not statutory laws. They are cultural expectations that influence how people socialize, dine, and build relationships.

Skipping the bill-splitting custom is just one example. By understanding these unwritten norms, readers can navigate Vietnam with greater awareness and appreciation, whether visiting briefly or building a long-term life in the country.