IETF language tag

File Format
Name	IETF language tag
Ontology	Electronic File Formats Elements of File Formats IETF language tag ; ; ;

An IETF language tag is a standard identifier for a human language or language variant. It is a short string of text; an example is "en-US".

A language tag consists of a sequence of hyphen-separated subtags, which define and refine the language.

Registration of subtags is handled by IANA. Language tags are no longer registered directly.

Specifications