| Abbreviation | Definition |
|---|---|
| MAL | Malayalam |
| MAN | Mandingo |
| MAO | Maori |
| MAP | Austronesian (Other) |
| MAR | Marathi |
| MAS | Masai |
| MAX | Manx |
| MAY | Malay |
| MDV | Maldives |
| MED | Mediterrranean Basin |
| MEN | Mende |
| MFK | Mofu, North |
| MFR | Middle FRench |
| MGA | Middle Gaelic (900 - 1200) |
| MIC | Micmac (American Indian) |
| MIL | Modern Indian Language |
| MIN | Minangkabau |
| MIS | Miscellaneous (Other) |
| MKH | Mon- Kmer (Other) |
| MLG | Malagasy |