Here's why:
* Historically: Montreal has been a French-speaking city since its founding.
* Official status: French is the official language of the city and the province of Quebec.
* Large French-speaking population: The majority of Montrealers speak French, making it a predominantly French-speaking city.
* Bilingualism: However, Montreal is also a very diverse city. Many people speak English as their first language, or they are bilingual.
So, while French is the dominant language in Montreal, it's not the first language for everyone.