| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Malayalam | Dravidian | മലയാളം | ml | mal | mal | mal | ||
| Marshallese | Austronesian | Kajin M̧ajeļ | mh | mah | mah | mah | ||
| Macedonian | Indo-European | македонски јазик | mk | mkd | mac | mkd | ||
| Ganda | Niger–Congo | Luganda | lg | lug | lug | lug | ||
| Luba-Katanga | Niger–Congo | Kiluba | lu | lub | lub | lub | also known as Luba-Shaba | |
| Luxembourgish | Letzeburgesch | Indo-European | Lëtzebuergesch | lb | ltz | ltz | ltz | |
| Lithuanian | Indo-European | lietuvių kalba | lt | lit | lit | lit | ||
| Lingala | Niger–Congo | Lingála | ln | lin | lin | lin | ||
| Limburgan | Limburger;Limburgish | Indo-European | Limburgs | li | lim | lim | lim | |
| Latvian | Indo-European | latviešu valoda | lv | lav | lav | lav + 2 | macrolanguage |