How to change the language and voice?

[FE-Girl]

see the title

[Luid101]

I am also working on this too, the voice sounds very robotic

[Luid101]

There is some info on the page:

Language Support
eSpeak supports multiple languages so speak.js can too. To do this, you need to build a custom version of speak.js:

Bundle the proper language files. For french, you need fr_dict and voices/fr. See commented-out code in emscripten.sh and bundle.py
Expose those files to the emulated filesystem, in post.js. See commented-out code in there as well.
Run emscripten.sh to build.
You then need to call speak() with the voice option that tells it to use the right voice for your language. For example, for French this should work:

speak('boulanger', { voice: 'fr' })