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The IANA Language Subtag Registry is where you find the subtags that can make up a BCP 47 language tag (separated by hyphens). In a short while I plan to link to guidelines for creating subtags, however, this tool already provides information to guide your choices and lets you check a language tag.
Click on the results to see the raw IANA data for a subtag.
This version has been updated to support the approximately 7800 new subtags, including extlang subtags, introduced in July 2009, and the tool now provides help in choosing subtags and a tag checker based on RFC 5646. Please report any bugs to me.
Web app created 1 April 2007. Last update 2009-09-10 18:42 GMT
Copyright © 2007-2009 Richard Ishida.