Hi! @anonymous_user_6726f6a7 : )
That’s strange… zh-CN is a supported language: Language support 
Are you getting errors in the log?
And currently there’s a known issue occurring with some people after update the Windows.
If you’re facing the same problem (using Microsoft Windows), Microsoft has released some updates to fix this:
Windows 10: October 17, 2022—KB5020435 (OS Builds 19042.2132, 19043.2132, and 19044.2132) Out-of-band (microsoft.com) 2
Windows 11 21H2: October 17, 2022—KB5020387 (OS Build 22000.1100) Out-of-band (microsoft.com) 1
Windows 11 22H2: Microsoft Update Catalog
If this issue is not applicable to your situation, please let me know
There’s a branch on github (with some implementations of the next update) with better logs and with the Azure SDK log enabled: lucoiso/UEAzSpeech at feature/STOP-SYNTH-28 (github.com)
There’s a .zip of the current state of this branch (is not the final version, errors may occur):
AzSpeech.zip (4.3 MB)
This will give you access to some of the changes I’ve made, including the opportunity to stop some tasks, and you’ll have access to your Azure logs in case you encounter any errors.