An oversight, when we're talking about an obligation? That's not very good. You're telling us that the number of complaints has declined, but don't take that for a guarantee. You only have to read the reports of the Commissioners of Official Languages. For too long, they've shown that you aren't doing your job adequately with regard to the service that must be provided in French on board your aircraft.
What recruitment incentives are you offering in order to hire bilingual people?