Currently we have backwards secondary sorting on for French (and only for French).
However, there is a significant cost to this setting in terms of performance, and no real advantage to users in terms of function.
There is little reason to believe that the average, even well-educated, francophone is aware or cares about these rules.
They affect very, very few cases (cote, peche, etc).
From all evidence, the original research behind the rules was based on a selection of dictionaries where a different selection would have given a different answer.
The plan is to issue a PRI for this change.