It's not just tts, it's other tists files voice recognized and then read by tts.
I skimmed a few on kemono, there was ㄥㄚ匚丨卂, Dark 千尺乇ㄚ卂, IV,… Also some non hypno cam girls doing chastity stuff…
Assumably the voice recognition butchering it is enough to get around copyright? And it is butchered. Listen to the original files instead, will give you more milage.