PlayOnLinux mscorefonts won't install

There is a chance you may be able to see the installation options if you limit to windowed mode. I recall something like that happening on one of my games. Try winecfg and then in the window that pops up, go to the Graphics tab and select to run in the 800x600 mode (you can change to any other window size). On POL, it should be under Tools->POL console, then enter winecfg. And then try installing again.

If that doesn’t work, you may want to consider alternatives: https://alternativeto.net/software/nuance-dragon-naturallyspeaking/?platform=linux - I noticed that espeak is listed on Synaptic.