The accent must be removed (Léa -> Lea) just like the other voices (eg. Celine, Peneloppe) to match with Amazon voices ID.
Fun fact: there is no alternative name for "Léa" on Amazon Polly documentation: https://docs.aws.amazon.com/en_us/polly/latest/dg/voicelist.html, probably just omitted.
Mitigation: alternative voices (with and without accents) can be put into `SUPPORTED_VOICES`, both `voice.get('Id')` and `voice.get('Name')` must be then checked for a match.
This fixes#19802.
ea8bb28d21