Ok good!
V 1.0.1 is out. Post 1.0, so Snowleopard support is fully here. Accented character support should mean that letters with Acute accents don't get dropped as silence, not that the engine is capable of multilingual speech itself.
https://github.com/tgeczy/panthera-speech/releases/download/pantheraspeech%2Fv1.0.1/pantheraspeech-1.0.1.nvda-addon
This does include extraction of the SnowLeopard images in ISO or DMG. Snowleopard.zip on my synths folder for now or other mirrors can be used with the image, so if you already had the voice data in the Macintalk folder, the engine will just show in the list of synthesizers to choose.