The language of the content or performance or used in an action. Please use one of the language codes from the [IETF BCP 47 standard](http://tools.ietf.org/html/bcp47). See also [availableLanguage](https://schema.org/availableLanguage).

Representation of a text [textValue](https://schema.org/textValue) using the specified [speechToTextMarkup](https://schema.org/speechToTextMarkup). For example the city name of Houston in IPA: /ˈhjuːstən/.

Form of markup used. eg. [SSML](https://www.w3.org/TR/speech-synthesis11) or [IPA](https://www.wikidata.org/wiki/Property:P898).

Text value being annotated.