X-Language

The 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' 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).

Header usage statistics

X-Language response header information and usage statistics.

Websites using header X-Language	519,943
Percentage of websites that use X-Language header	0.63%
Total discovered header values	23
Header uses directives	No
Header values are unique or random	No
Most popular in the country	Canada