formality

You can optionally specify the desired level of formality for translations to supported target languages. The formality setting controls the level of formal language usage (also known as register) in the translation output. You can set the value to informal or formal. If you don't specify a value for formality, or if the target language doesn't support formality, the translation will ignore the formality setting.

If you specify multiple target languages for the job, translate ignores the formality setting for any unsupported target language.

For a list of target languages that support formality, see Supported languages in the Amazon Translate Developer Guide.