In pyvideotrans win 3.91 piper-tts does not support languages other than English and Chinese.
If you follow the instructions and place the piper folder with models of other languages in the models folder, he does not see them when restarting.
I tried to change videotrans/voicejson/piper.json
and register other language models in it , but after restarting the program and selecting a different language, the program returns an error.
Perhaps this can be corrected or supplemented in some way , so that it would be possible to use others .