Translation Translation of just the dialogue in a language other than the audio track dialogue. Hard of hearing Subtitles produced for the deaf and hard of hearing people Audio description Subtitles that include the description of the visual scene and intended to be used by the receiver to render audio description (e.g. with text-to-speech technology. Content related commentary Subtitles that include content-related commentary (e.g. directors commentary). Forced Narrative Subtitles used to clarify dialogue, burned-in text, and other information that is not explained or easily understood by the viewer.