Hi,
I'm Sumit, here to help with your query in the Microsoft Q&A.
Apologies for any inconvenience you are experiencing. I am happy to help you today.
That is a bit odd. May I know if you are using the correct language on your system and if the correct voice package is installed?
It can be checked in Settings > Time and Language> Your Language > Select it > 3 dots > Speech.
I look forward to your response and am happy to work with you until we find a solution. Please keep me updated.