My likings don't count provided that the Moodle Docs are happy. Happy docs will make the help-seekers happy, happy help-seekers will make the helpers happy.
Coming back to your original question, what you are looking for is a list of broken links in the english documentation which points to french documentation. Well, why to french docs only? This is a general question which is valid for all other languages too. Yes, there is also the reverse, given a docs wiki of one language finding out the broken links to a given second language.
The general answer is IMHO
is a script which takes four parameters as input: version of the source wiki (sXY), language of the source wiki (slang), version of the target wiki (tXY) and the language of the target wiki (tlang) - /dev/ being a special case, because it has "no language". Possibly a scripting project for somebody along the lines of this "[Firefox
] Add-on: Compare MoodleDocs