espeak ng is GPLv3 licensed

[dantheman3333]

Hi, I noticed that a recent commit pulled in bindings to espeak ng through https://crates.io/crates/espeak-rs. Espeak NG is licensed under GPLv3. Unfortunately this means that this project would need to switch over to GPLv3 as well if it remains used -- https://opensource.stackexchange.com/questions/11658/does-whole-project-need-to-be-under-gplv3-when-using-a-gplv3-library.

[lucasjinreal]

humm, that's serious question. espeak-ng didn't have a native implement in pure rust. Current needs it's phonemizer. However, this part could be token apart when new model comes out.

[Jerboas86]

Kokoro v1.0 comes with its own G2P library Misaki. Maybe, we could port this library into rust ?

[lucasjinreal]

Misaki employs espeak-ng internally. The distinction lies in its multilingual support achieved through other libraries such as the utilization of pypinyin for Chinese.

Porting Misaki could be significant by reusing the existing English part and adding more support for other languages.

However, I would suggest let's start languages one by one.