The book "VIETNAMESE LANGUAGE" is a collection of research works by Dr. Tran Thi Ngoc Lang on Southern dialects in comparison with Northern and Central Vietnamese words, and from the entire population in general. In the articles, the author analyzes and explains linguistic phenomena in a thorough and extremely interesting way. The book is divided into 3 parts: Part 1 specializes in analyzing and explaining the difference between lexical-semantic phenomena in the North and South; Part 2 is a collection of corpus, the main groups of words in the Southern dialect; Part 3 is the scattered articles on language, analyzing literary works of Ho Bieu Chanh, Son Nam, Nguyen Ngoc Tu to clarify more interesting features in Southern language, Southern writing, ensuring scientific accuracy but rich in images and emotions, expressing the author's delicate feelings and love for language - especially Vietnamese language in the South - of the author.