After 1975, a significant wave of Vietnamese refugees fled the country, with the majority coming from Southern Vietnam, particularly Saigon (now Ho Chi Minh City) and the Mekong Delta region. Many resettled in countries such as the United States, Canada, Australia, and France. As a result, the Southern dialect naturally became the most prevalent form of Vietnamese spoken within overseas communities. So when people hear Vietnamese abroad, it's often spoken with a Southern acce