| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Macedonian | Indo-European | македонски јазик | mk | mkd | mac | mkd | ||
| Malagasy | Austronesian | fiteny malagasy | mg | mlg | mlg | mlg + 10 | macrolanguage | |
| Malay | Austronesian | Bahasa Melayu; بهاس ملايو | ms | msa | may | msa + 13 | macrolanguage; Standard Malay is [zsm]; Indonesian is [id/ind] | |
| Malayalam | Dravidian | മലയാളം | ml | mal | mal | mal | ||
| Maltese | Afro-Asiatic | Malti | mt | mlt | mlt | mlt | ||
| Manx | Indo-European | Gaelg; Gailck | gv | glv | glv | glv | ||
| Maori | Austronesian | te reo Māori | mi | mri | mao | mri | also known as Māori | |
| Marathi | Indo-European | मराठी | mr | mar | mar | mar | also known as Marāṭhī | |
| Marshallese | Austronesian | Kajin M̧ajeļ | mh | mah | mah | mah | ||
| Mongolian | Mongolic | Монгол хэл | mn | mon | mon | mon + 2 | macrolanguage |