How to add a new language to jekyll theme chirpy?

Hi ! I’m using the chirpy theme (the starter) for my blog and basically I want that people can choose between english and french on the website and on the articles when the translation exist.

Here is my blog repo : GitHub - wwwGeneral/

It seems that i’m not the only one who struggle with that, if somebody know how to do that please tell me :slight_smile:

Thanks you !