| Abbreviation | Definition |
|---|---|
| MLT | Maltese |
| MNI | Manipuri |
| MNO | Manobo Languages |
| MOH | Mohawk |
| MOL | Moldavian |
| MON | Mongolian |
| MOS | Mossi |
| MRI | Maori |
| MSA | Malay |
| MSA | Modern Standard Arabic |
| MUL | Multiple Languages |
| MUN | Munda Languages |
| MUS | Creek |
| MWR | Marwari |
| MXC | Manyika |
| MYA | Burmese |
| MYN | Mayan Languages |
| NAH | Aztec |
| NAI | North American Indian (Other) |
| NAS | Northern Asia |