The 'Lang' Client Hint

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Last updated 2019-06-02 (latest revision 2018-11-29)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a Client Hint that aims to allow developers to opt-in to the ability to perform content negotiation based on the set of natural languages preferred by the user agent. This new mechanism is intended to improve upon the privacy properties of the "Accept- Language" header, and eventually to supplant it entirely.


Mike West (

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