Subtitles are textual versions of the dialog in films and television programs, usually displayed at the bottom of the screen. They can either be a form of written translation of a dialog in a foreign language, or a written rendering of the dialog in the same language, with or without added wikipedia.org

Vietnamese is the national and official language of Vietnam. It is the mother tongue of Vietnamese people (Kinh), and of about three million overseas Vietnamese. It is also spoken as a second language or a first language by many ethnic minorities of Vietnam. wikipedia.org

Article marketing is a type of advertising in which businesses write short articles about themselves as a marketing strategy. A primary style for the articles includes a bio box and byline (collectively known as the resource box) about the business. wikipedia.org