Unfortunately the French will never do this. You need to understand the French phyche and what being "French" means. Being French means using the French language - it is what being French means. It's not living there, it's not having a French father.....it's speaking French.
The French will protect their language until the bitter end. Fighting it is a losing battle.
If the Americans spoke French then we wouldn't be having this conversation as all international (verbal) intercourse would be in French