languageCode

The language code that represents the language of the entries in your custom vocabulary. Each custom vocabulary must contain terms in only one language.

A custom vocabulary can only be used to transcribe files in the same language as the custom vocabulary. For example, if you create a custom vocabulary using US English (en-US), you can only apply this custom vocabulary to files that contain English audio.

For a list of supported languages and their associated language codes, refer to the Supported languages table.