M
- Macedonia
- Macedonian (statewide)
- Madagascar
- French (official)
- Malagasy (official and national)
- Malawi
- Chichewa (national)
- English (official)
- Malaysia
- Malay (national)
- English (official for some purposes)
- Maldives
- Dhivehi
- Mali
- French
- Malta
- Maltese (national)
- English
- Marshall Islands
- English
- Marshallese (national)
- Mauritania
- Arabic (official)
- French
- Fula (national)
- Soninke (national)
- Wolof (national)
- Mauritius
- English (official)
- Mauritian Creole
- French (national)
- Mexico
- No official language nationwide, Spanish is the de facto but not the de jure official language.
- Federated States of Micronesia
- English (statewide except in Kosrae, where it has a constitutionally protected associate status)
- Chuukese (in Chuuk)
- Kosraean (in Kosrae)
- Pohnpeian (in Pohnpei)
- Ulithian (in Yap)
- Yapese (in Yap)
- Moldova
- Romanian (statewide)
- Gagauz (regional language)
- Russian (regional language)
- Ukrainian (regional language)
- Monaco
- French
- Mongolia
- Mongolian
- Montenegro
- Montenegrin (national)
- Albanian (in Ulcinj, along the eastern border with Albania)
- Bosnian (regional in the north of the country)
- Croatian (in Tivat, the Bay of Kotor area)
- Serbian (in Herceg Novi)
- Morocco
- Amazigh
- Arabic
- Mozambique
- Portuguese
- Myanmar (Burma)
- Burmese
Read more about this topic: List Of Official Languages By State