| Macedo-Romanian; Aromanian; Arumanian | Aromunisch | rup | |
| Macedonian | Makedonisch | mac/mkd | mk |
| Madurese | Maduresisch | mad | |
| Magahi | Khotta | mag | |
| Maithili | Maithili | mai | |
| Makasar | Makassarisch | mak | |
| Malagasy | Malagassi-Sprache | mlg | mg |
| Malay | Malaiisch | may/msa | ms |
| Malayalam | Malayalam | mal | ml |
| Maltese | Maltesisch | mlt | mt |
| Manchu | Mandschurisch | mnc | |
| Mandar | Mandaresisch | mdr | |
| Mandingo | Malinke-Sprache | man | |
| Manipuri | Meithei-Sprache | mni | |
| Manobo languages | Manobo-Sprache | mno | |
| Manx | Manxs | glv | gv |
| Maori | Maori-Sprache | mao/mri | mi |
| Mapudungun; Mapuche | Arauka-Sprachen | arn | |
| Marathi | Marathi | mar | mr |
| Mari | Mari | chm | |
| Marshallese | Marschallesisch | mah | mh |
| Marwari | Marwari | mwr | |
| Masai | Massai-Sprache | mas | |
| Mayan languages | Maya-Sprachen | myn | |
| Mende | Mende-Sprache | men | |
| Micmac; Mi'kmaq | Micmac-Sprache | mic | |
| Minangkabau | Minangkabau-Sprache | min | |
| Mirandese | Mirandesisch | mwl | |
| Mohawk | Mohawk-Sprache | moh | |
| Moksha | Mokschamordwinisch | mdf | |
| Moldavian | Moldauisch | mol | mo |
| Mon-Khmer (Other) | Andere Mon-Khmer-Sprachen | mkh | |
| Mongo | Mongo-Sprache | lol | |
| Mongolian | Mongolisch | mon | mn |
| Mossi | Mossi-Sprache | mos | |
| Multiple languages | | mul | |
| Munda languages | Mundasprachen | mun | |
| N'Ko | | nqo | |
| Nahuatl languages | Nahuatl | nah | |
| Nauru | Nauruanisch | nau | na |
| Navaho, Navajo | Navajo-Sprache | nav | nv |
| Ndebele, North | Ndebele-Sprache (Simbabwe) | nde | nd |
| Ndebele, South | Ndbele-Sprache (Transvaal) | nbl | nr |
| Ndonga | Ndonga | ndo | ng |
| Neapolitan | Neapolitanisch | nap | |
| Nepal Bhasa; Newari | Newari | new | |
| Nepali | Nepali | nep | ne |
| Newari; Nepal Bhasa | Newari | new | |
| Nias | Nias-Sprache | nia | |
| Niger-Kordofanian (Other) | Andere Nigerkordofanische Sprachen | nic | |
| Nilo-Saharan (Other) | Andere Nilosaharanische Sprachen | ssa | |
| Niuean | Niue-Sprache | niu | |
| Nogai | Nogaisch | nog | |
| Norse, Old | Altnorwegisch | non | |
| North American Indian (Other) | Andere Indianersprachen (Nordamerika) | nai | |
| Northern Sami | Nordsaamisch | sme | se |
| Northern Sotho; Pedi; Sepedi | Sotho-Sprache (Nord) | nso | |
| North Ndebele | Ndebele-Sprache (Simbabwe) | nde | nd |
| Northern Frisian | Nordfriesisch | frr | |
| Norwegian | Norwegisch | nor | no |
| Norwegian Bokmål; Bokmål, Norwegian | Bokmål | nob | nb |
| Norwegian Nynorsk; Nynorsk, Norwegian | Nynorsk | nno | nn |
| Nubian languages | Nubische Sprachen | nub | |
| Nyamwezi | Nyamwezi-Sprache | nym | |
| Nyanja; Chichewa; Chewa | Nyanja-Sprache | nya | ny |
| Nyankole | Nikole-Sprache | nyn | |
| Nynorsk, Norwegian; Norwegian Nynorsk | Nynorsk | nno | nn |
| Nyoro | Nyoro-Sprache | nyo | |
| Nzima | Nzima-Sprache | nzi | |
