Mont BrE AmE mɒnt AmE mɑːnt —but in names of mountains mɒ̃, mɒn ‖ mɔːn, mɑːn, moʊn —French [ mɔ̃ ]
▶ ˌ Mont ˈ Blanc blɒ̃ blɒŋ AmE blɑːŋ —French [ blɑ̃ ] BrE AmE
MONT
Meaning of MONT in English
Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012