If you were not a troll you would have seen that all the technical documentation about how to contribute and how to host an instance in the repository is in English. The code is well documented 100% in English.

It make sense however that pages for users is in French, since it’s been developed for French users. If you want Geraldine, the secretary of the tax office in Trifouilly les Oies to use it, you need to address her in French.