It’s the law in Canada DA.
Maybe do a little research, and get some reading comprehension skills.
From the very article you posted
“He told the outlet he'd filed a complaint with the Quebec Office of the French Language after the flight. Beaudoin said he didn't complain to Air Canada because he didn't trust their process, instead escalating the matter to language authorities.
Air Canada is subject to Canada's Official Languages Act
, which gives equal status to both English and French. The airline was fined $15,700 in 2019 after a couple complained that some signs on a domestic flight were only in English, BBC News reported