Sign Language Interpretation

For web video, sign-language interpretation can give Deaf sign-language users access to speech and tone that written captions may not convey in the same way. An interpreter may appear within the video frame or in a synchronized separate view. The required sign language depends on the audience: American Sign Language and British Sign Language, for example, are distinct languages.

WCAG 2.2 Success Criterion 1.2.6 addresses sign-language interpretation of prerecorded audio content in synchronized media at Level AAA. This does not mean every website is automatically legally required to provide interpretation for every video. Applicable obligations depend on the law, organization, audience and service context; captions are a separate accessibility feature and should not simply be replaced by signing.

Good implementation considers interpreter visibility, legibility at mobile sizes, synchronization and the ability to choose a suitable video layout. Plan with the intended Deaf community where possible. This topic concerns language access rather than plain-language writing, and one format will not meet every person’s needs.