Should we have the whole AF in French and English? Also, if we have our proposal in English, should we just copy-paste the parts in the French version?

As you can read in the Courtesy Application Form, part A.2, only the field “A.2 Project summary” must be filled in both languages.
For the other fields, and only if the field is compulsory to be filled in, you can simply copy and paste the content of the field in one language into the field of the other language.