field Registered
Verified 2026-09-18 · registry updated
2026-08-28Content-Language
Identifies the language intended for a representation's audience.
Use Content-Language with localized representations and include it in Vary when it affects cache selection.
httpheadercontent-negotiationi18n
Reference (http)
Content-Language: en-US
Use Content-Language with localized representations and include it in Vary when it affects cache selection.
Common mistakes
- Confusing the representation language with the language used in a user's request.
IANA registry: http-fields/field-names
Registry reference: RFC 9110, Section 8.5: HTTP Semantics