@Johan (WMF) Can you make sure I set up the translation tags on this page correctly? Thank you!
Topic on API talk:Get the contents of a page
It doesn't exactly follow the recommendations in the documentation, but I'm not sure the docs were written with these kind of pages in mind. (: At a glance, it should include the stuff you want translated and exclude the stuff you don't want translated. The one drawback is that you'll probably run into the bug where the edit section links won't work properly.