Cantonese voice selection does not work in macOS system apps

Does this help?

Text to speech not working for Cantonese … - Apple Community

sungyle wrote:

On my Macs running macOS 15.5, I’ve noticed that when Cantonese (Hong Kong) is selected as the System Voice under Accessibility > Spoken Content, the setting is not respected across all Apple apps.

In Pages, it works correctly. But in Safari, Mail, Notes, and Numbers, macOS switches to a Mandarin voice, even though Cantonese remains selected in settings.

Can anyone confirm if this is expected behavior? Or is there a known issue? I’d like to know if there’s a way to enable full Cantonese TTS functionality across all system apps.

Thank you.

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