https://docs.aws.amazon.com/polly/latest/dg/API_SynthesizeSpeech.html#API_SynthesizeSpeech_RequestSyntax
Hi,
If you will see the valid voices, it does not contain Kajal as one of the valid VoiceId. This is causing our API to fail when trying to synthesize speech for the neural voice Kajal (Indian English, Female). Please find below list of valid VoiceId currently:
Aditi | Amy | Astrid | Bianca | Brian | Camila | Carla | Carmen | Celine | Chantal | Conchita | Cristiano | Dora | Emma | Enrique | Ewa | Filiz | Gabrielle | Geraint | Giorgio | Gwyneth | Hans | Ines | Ivy | Jacek | Jan | Joanna | Joey | Justin | Karl | Kendra | Kevin | Kimberly | Lea | Liv | Lotte | Lucia | Lupe | Mads | Maja | Marlene | Mathieu | Matthew | Maxim | Mia | Miguel | Mizuki | Naja | Nicole | Olivia | Penelope | Raveena | Ricardo | Ruben | Russell | Salli | Seoyeon | Takumi | Tatyana | Vicki | Vitoria | Zeina | Zhiyu | Aria | Ayanda