This standard specifies the internationally used language name codes. This standard applies to terminology, lexicography and linguistics, as well as to any information processing and any field of work that requires the expression of a language in coded form.
GB/T 4880-1991 history
2005GB/T 4880.1-2005 Codes for the representation of names of languages-Part 1:Alpha-2 code
1991GB/T 4880-1991 Code for the representation of names of language