French was the official language of Vietnam under French colonial rule during the 19th and early 20th centuries. After 1954, French fell into disuse in North Vietnam, and maintained a high status in South Vietnam. Since the Fall of Saigon in 1975, French has declined in modern Vietnam: in 2018, slightly under 1% of the population was fluent in French.
Vietnam is the largest Francophone country in Asia and is a member of the Organisation internationale de la Francophonie (OIF). Since the 1990s, the Vietnamese government in cooperation with the French government, has promoted French-language education in the country's schooling system, acknowledging the cultural and historic value of the French language. The language also continues to be used as a prestige language in certain professional sectors.

History
The French language's presence in Vietnam began in the 18th century when French explorers and merchants began sailing near the Indochina coast. When the French replaced the Portuguese as the primary European power in Southeast Asia in the 1790s by helping to unify Vietnam under the Nguyen Dynasty and later colonizing Southern Vietnam, they introduced the French language to locals. French became the governing language of French Indochina, which included present-day Vietnam, Laos and Cambodia. Many Vietnamese began learning French, which replaced the native Vietnamese and royal court Classical Chinese languages; and eventually the Latin alphabet became the official script of the Vietnamese language. The building of missionary and government schools spread the French language among educated Vietnamese and it soon became the language of the elite classes by the end of the nineteenth century. By the early twentieth century, the French language began spreading to the urban masses and became the primary language of education. A French pidgin called Tây Bồi was developed among Vietnamese servants in French households and those who spoke partial French. Nevertheless, at the French language's height in Vietnam between the 1900s and 1940s, many Vietnamese did not speak French well or learn the language and some revolutionaries refused to learn the colonial language, though ironically speeches and papers written to promote independence were written in French. During World War II, Japan briefly occupied Vietnam and established Vietnamese as the sole official and educational language.

The influence of the French language in Vietnam slowly began to decline after World War II as revolutionary movements increased and their works began to be written more in Vietnamese. Poorer and generally, more rural populations began to resist French rule and guerrilla forces, the Viet Minh attacked the French and sparked the First Indochina War. The French language however, continued its presence in government, education and media in areas not held by the Viet Minh. At the Battle of Dien Bien Phu in 1954, the Viet Minh defeated the French and Vietnam gained its independence, though the nation was soon divided into a communist, Soviet-orientated north, and a capitalist, US-orientated government in the south. Fearing persecution by the communist government, hundreds of thousands fled to the south, including French-educated and speaking elite. Despite the Vietnam War erupting shortly afterwards, French continued a healthy presence in South Vietnam, where it was an administrative and educational language. The sharpest decline of the French language in Vietnam was after the Fall of Saigon in 1975 as the communist government imposed Vietnamese as the sole official and educational language on the entire nation, including the south, which was in a transitional phase until 1976.

The number of students receiving their education in French in Vietnam declined to about 40% by the 1980s and continued to decline well into the 1990s. Additionally, many French-speakers who were anti-communist fled Vietnam and immigrated to nations such as the United States, France, Canada (most particularly Quebec and Ontario) and Australia. As of 2000, only about 5% of students received their education in French. Meanwhile, the rise of the English language caused a further decline in the status of French in Vietnam as English became seen as the language of international trade, commerce and diplomacy. Whilst English has displaced French as the most studied first foreign language, since the 2000s, French language education has been on the rise. By 2022, it had become the primary foreign language course at schools in over half of the country's provinces.





