that does help - DOS TTS voices are relatively different than modern TTS, as they’re synthesized, versus sample playback. I was more curious to know (and should have specified) the license for the TTS voice. For commercial purposes, they’re usually an open-source voices.
If you're asking if you can use phrases generated with this tool for commercial purposes... I don't see why not! I certainly don't mind and the only thing in here that's not handcrafted from scratch by me is the samples for Dad Bot, which I acquired by recording the audio from an old dos program running in DOSBox into Audacity and the cutting and cleaning up that raw audio. I'm pretty sure you're legally good to go.