sourceLanguageCode

The language code for the language of the source text. For a list of language codes, see Supported languages.

To have Amazon Translate determine the source language of your text, you can specify auto in the SourceLanguageCode field. If you specify auto, Amazon Translate will call Amazon Comprehend to determine the source language.

If you specify auto, you must send the TranslateText request in a region that supports Amazon Comprehend. Otherwise, the request returns an error indicating that autodetect is not supported.