Hello,
On the Apple website you can read that Voice-Over supports a lot of languages on the Apple Watch:
https://support.apple.com/en-us/HT206175
They say that the Apple Watch supports Flemish (Belgium) but this is not correct. The Watch only supports Dutch. On the iPhone and Apple TV you have the option to choose a Flemish voice.
I wrote an email to accessibility@apple.com to inform them about the wrong information on their website. This was the reply:
***
Hello,
Thank you for your email and your feedback. I’ve filed a report on this with the appropriate group.
***
Sounds like a standard reply. Do they send follow)up emails?
Maybe an idea to check your native language. Maybe there are more lanuages listed on the Apple website as supported but are not really possibel to choose as a VO lanuage.
Regards