Here are links to Affinity Photo Help in Epub in French as requested (I think its correct but I don't speak or read French).
French Help EPUB 1.4.2 Links
One Drive Link: https://onedrive.live.com/redir?resid=704B96CF375A8A3B!31696&authkey=!AD2a7RGZPOocnwo&ithint=file%2cepub
Box Link: https://app.box.com/s/3p98wf8yibh1tcmjwi530u4n8qvuojaw