I asked for a comic by a Quebecois author in Montreal, and eventually (very grateful to the staff in Librarie BD for staying in French to help me practice) picked this one as it looked a bit easier and prettier than other offerings.
It's not easier! A lot of Quebecois sacrés and petits sacrés (e.g. caline is the "shoot" to calisse) and elisions ("chui" -> "je suis") but the overall story is fine to follow.
It is of a family's grandfather as he ages and enters respite care. Starting with big family sleepovers, having him tell the story of his youth (bad). The shots of Québec that I recognise (bits of Montréal and Québec City) are good enough for me as a tourist to recognise.