The only regions in Canada that have commissioners who are responsible for language issues are the provinces of Ontario and New Brunswick, as well as the Northwest Territories and Nunavut.
Attaching the commissioner to the Office of the Ontario Ombudsman would strip the commissioner of one of his two roles, the one associated with the promotion of French-language services, in which he conducts studies and investigations. That's not in the mandate of an ombudsman, who responds to individual cases submitted by individual citizens. The commissioner position should therefore be changed. However, Mr. Dubé has bluntly said it's not his role to act as the Commissioner of Official Languages.
It's possible to have an organization that's designed to receive complaints, if that's what you want, but that's not the commissioner's role. His role is to advance English and French, increase awareness and educate not only the the government, but also the anglophone majority in order to improve French-language services in Ontario in health, education and other sectors.