High School and Beyond is a national longitudinal study of the cohorts of 1980 high school seniors and sophomores in the United States, intended to provide information through the early adulthood of these students. The machine-readable data file (MRDF) Language File contains data on each student who responded that he or she had experience in a language other than English in the High School and Beyond base-year survey in 1980. It includes 11,303 records with information on childhood languages; current language spoken; the most important language; number of languages used; English or non-English comprehension; and use of non-English language at home. Data are also presented on whether students received instruction in elementary and secondary schools for students for whom English is not the primary language, as well as whether they took cultural history courses related to the primary language. The data tape consists of: (1) the language questionnaire information file; (2) a Statistical Package for the Social Sciences control card file; and (3) a machine-readable codebook. The first variables on the file are a random four-digit school code and a two-digit student code. The school code is used to group students from the same school. The school code and the student code together form a unique code for identifying individual records. The codebook is also available as a bound volume. POPULATION: High School Sophomores (3,779,288); High School Seniors: (3,040,000). TYPE OF SURVEY: National Survey; Longitudinal Survey; Sample Survey. SAMPLE: High School Sophomores and Seniors (11,303). RESPONDENTS: High School Sophomores and Seniors. RESPONSE RATE: High School Sophomores and Seniors (11,303=100%). FREQUENCY: Once. YEAR OF EARLIEST DATA: 1980. (SLD)