Windows 11 introduces more natural voices, such as Microsoft Jenny and Microsoft Aria. How can I access them with SAPI 5?
This problem can be fixed with the NaturalVoiceSAPIAdapter utility. It will add new speech engines to the SAPI 5 voice list; it can also add the voices available in the Microsoft Edge browser to this list. More information can be found here. Since Balabolka is a 32-bit application, you should install the 32-bit and 64-bit versions of the utility (see "Installation Status" in the utility's window). You can download the latest release of the utility.
Windows allows to add voices for other languages: select Start=>Settings=>Time & language=>Language & region, go to Preferred languages, select Add a language. Choose and install the optional feature Text-to-speech.