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Content-Language entity header is used to describe the language(s) intended for the audience, so that it allows a user to differentiate according to the users' own preferred language.
For example, if "
Content-Language: de-DE" is set, it says that the document is intended for German language speakers (however, it doesn't indicate the document is written in German. For example, it might be written in English as part of a language course for German speakers. If you want to indicate which language the document is written in, use the
lang attribute instead).
Content-Language is specified, the default is that the content is intended for all language audiences. Multiple language tags are also possible, as well as applying the
Content-Language header to various media types and not only to textual documents.
|Header type||Entity header|
|Forbidden header name||no|
|CORS-safelisted response header||yes|
|CORS-safelisted request header||yes, with the additional restriction that values can only be
Content-Language: de-DE Content-Language: en-US Content-Language: de-DE, en-CA
- Multiple language tags are separated by comma. Each language tag is a sequence of one or more case-insensitive subtags, each separated by a hyphen character ("
%x2D). In most cases, a language tag consists of a primary language subtag that identifies a broad family of related languages (e.g., "
en" = English), which is optionally followed by a series of subtags that refine or narrow that language's range (e.g., "
en-CA" = the variety of English as communicated in Canada).
Indicating the language a document is written in
Do not use this meta element like this for stating a document language:
<!-- /!\ This is bad practice --> <meta http-equiv="content-language" content="de">
Indicating a target audience for a resource
Content-Language header is used to specify the intended audience of the page, and can indicate that this is more than one language.
Content-Language: de, en
|RFC 7231, section 220.127.116.11: Content-Language||Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content|
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
|Chrome Full support Yes||Edge Full support Yes||Firefox Full support Yes||IE Full support Yes||Opera Full support Yes||Safari Full support Yes||WebView Android Full support Yes||Chrome Android Full support Yes||Firefox Android Full support Yes||Opera Android Full support Yes||Safari iOS Full support Yes||Samsung Internet Android Full support Yes|
- Full support
- Full support