I am not asking you to be fluent in French or anything. I just believe it's a question of respect to get at least once sentence right, especially if you're gonna keep using it over and over, if you have the possibility to so. As for the Legion part of my feedback, it is the name of your faction, and I don't think there'd be any reasons to get your group's name wrong.
La Brise practically has no French players save for me or Virus, and rarely do I correct their French. I honestly think it's just a question of respect.