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Making Sense of Language Identification: How changes in ISO 639 and IETF BCP 47 affect language tagging and selection.

Addison Phillips
Yahoo! Inc.

The recent addition of ISO 639-3, reorganization of ISO 639 in general, and the adoption of RFC 4646 and RFC 4647 as the latest version of IETF BCP 47 (language tagging and language tag matching) has resulted in a proliferation of new choices when identifying the language of content and for the selection of content according to language. This presentation, by one of the editors of BCP 47, details what the changes are, what options are available, how to work with the new standards, and how to choose among them for your application.

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