Vietnam (vietnamese) is the official language, which is when the academic year 2463, Vietnam was a referendum to use the Roman alphabet. Instead of Chinese characters. Written in Vietnamese.
Vietnamese (Vietnamese) is the official language, which the 2463 academics, Vietnam referendum to use the Roman alphabet instead of Chinese characters. Writing in the Vietnamese language.
In Viet Nam (Vietnamese) is the official language in academic circles, when Viet Nam is 2463 (1920) referendum which uses a Roman alphabet instead of Chinese characters in written language, Viet Nam.