Is Praat developed by Dreamtonics or a third party developer?

My understanding is, each bot can only sing one language, and you need to type in the words/characters of that particular language in order for the bot to work.

For example, Natalie and Solaria can only sing English. Cheng Xiao and Feng Yi can only sing Chinese. Natsuki and Ryo can only sing Japanese.

Also, their pricing mode is confusing. Each voice database costs $79 to $89. But if you buy the Bundle of Studio Pro + Any Voice database, you can get all voices with only $151?

A Canadian music producer, singer songwriter, composer, and professional guitarist.