Language accepted in tts.speak service

Hi,
I’m trying to speak using my google home speakers in Italian. I installed Piper voice engine.

When, in a script, I set the “language” parameter, no matter if “Italian”, “it”, “IT-it” it not working.

Without language parameter works, but in english. Where I can find language code? And, in general, why is so difficult to know how to set this parameter?

Thanks.

Check the configuration page of the piper add-on. Set the voice there to Italian.

Where? There is no configuration on Piper add-on.

Oh, ok. Sorry, I was looking in “device” config, not “add-on”. Thank you.