It'd add extra work. And at the current state this repo/docs is barely being taken care of.
Potentially screenshots of SC2Editor would have to be localized too, and if so these would potentially need to be redone or edited - with some extra captions, to outline/translate whatever screenshots shows.
Using SC2Editor in non-english is just bad idea to begin with, since it uses machine translation (from previous generation) for a lot of stuff. It makes stuff confusing.
Can you implement language system for your wiki? readthedocs has locale thing and i hope you will add it in some next patch