A: Afar, Afrikaans, Albanian, Alemannic, German, Alsatian, American, Amharic, English, Apache, Arabic (literary, modern and dialectal), Aramaic, Arawak, Armenian, Arpitan (Franco-Provençal), Auvergnat, Avar, Avikam, azeri
B: Balinese, Baloutchi, Bambara, Bamileke, Bamoun, Baoulé, Basaa, Basque, Bavarian, Bengali, Berber (Kabyle and Tachelhit), Berliner, Bété, Belarusian, Burmese, Bislama (Bislama, Bislama), Bourouchaski (Burushaski, Bouroushski) , Brahoui, Brazilian (Brazilian Portuguese), Breton, Bulgarian,
C: Cajun, Caledonian, Cambodian (Khmer), Cape Verdean, Catalan, Cebuano, Cherokee, Chinese, Chinyanja (Chichewa, Nyanja), Choctaw, Chuwash, Sinhalese (Singhalese), Ciyawo, Comorian (Shimasiwa), Korean, Corsican, Creole ( Guadeloupean, Haitian), Cree, Croatian,
D-E: Danish, Dioula, Douala, Drehu, Spanish, Esperanto, Estonian, Ewe, Ewondo,
F-G: Fang, Farsi (Persian), Finnish, Flemish (from the Westhoek), Fon, French as a foreign language, Franconian, Franco-Provençal (Arpitan), Gaelic (from Scotland and Ireland), Galician, Gallo, Welsh, Gascon , Gbaya, Georgian, Ancient Greek, Modern Greek, Guadeloupean (Creole), Guarani, Gujarati,
H: Haitian (Creole), Hamburgian, Hausa, Hawaiian, Hebrew, Hessian, Hindi, Hmong, Hungarian,
I-J: Igbo, Indonesian, Inuktitut, Irish (Irish Gaelic), Icelandic, Isangu, Italian, Japanese, Jèrriais (Jersiais), Jola, Judeo-Spanish,
K: Kabard (Cherkesse), Kabyle (Algerian Berber), Kannada, Karakalpak, Karatchay-Balkar, Karen, Kazakh, Khmer (Cambodian), Khakas, Khowar, Kikongo, Kikuyu, Kimassai (Masai), Kinyarwanda, Kyrgyz, Kirundi (Rundi ), kituba, kikongo (kongo), konkani, koulango, kouy, koumyk, kuna, kurdish,
L: Ladakhi, Lakota (Sioux), Lao, Lapland, Languedoc, Latin, Lenape, Latvian, Limousin, Lingala, Lissou, Live, Lobi, Lorraine (Platt Lorraine), Lithuanian, Lyonnais, Luxembourgish,
M: Macedonian, Mafa, Malay, Malayalam, Malagasy, Maltese, Manjak, Manx (Manx, Manx), Maori, Mapuche, Marathi (Maratha), Marquesan, Marseilles, Marshall, Masai (Kimassai), Mashi, Maya, Minangkabau, Mohawk , mon, mongolian, montagnais, mordve, moré,
N-W: Nahuatl, Navajo, Dutch, Nepali, Newari, Ngbaka, Nice, Norman, Norwegian, Nyanja (chinyanja, chichewa), Occitan, Oriya, Ossetian, Udmurt, Ouolof (Wolof), Oromo, Urdu (urdu), Uzbek,
P-Q: Pashto, Paici, Pangasinan, Papiamento (Papiamentu), Passamaquoddy, Punjabi, Persian (Farsi), Fulani (Pulaar), Pedi (Northern Sotho), Picard, Pijin (from the Solomon Islands), Platt Lorrain (Lorraine), Polish , Portuguese, Purepecha, Provençal, Quechua,
R-S: Rwanda, Rhenish, Rhaeto-Romance (Romansh), Romani (Gypsy), Romanian, Rundi (Kirundi), Russian, Samoan, Sanskrit, Serbian and Serbo-Croatian, Schwytzertutsch (German-speaking Switzerland), Setswana (Tswana), Shimanosiwa ( Comorian), Shona, Sindhi, Sinhala (Sinhalese), Sinhalese (Sinhalese), Sioux (Lakota), Slovak, Slovenian, Somali (Somali), Songhay-Zarma (Zarma), Soninke, Swabian, Sundanese, Sureth, Sosso, Sotho du Northern (Pedi), Southern Sotho (Sesotho), Swedish, Swahili,
T-U-V: Tachelhit (Moroccan Berber), Tajik, Tagalog, Tahitian, Tamil, Tamazight (Moroccan Berber), Tapon, Czech, Circesse (Kabard), Chechen-Ingush, Téké, Telugu, Thai, Tibetan, Tigrina, Tlingit, Tuvaluan, Tseltal , Turkmen, Tswana (Setswana), Gypsy (Romani), Turkish, Twi, Ukrainian, Urdu (Urdu), Vietnamese, Vili
W-X–Y-Z: Walloon, Westphalian, Wolof (oulof), Xhosa, Yiddish, Yoruba, Yipunu, Zarma (songhay-zarma), Zulu.
For some languages, there is no method but an audio or video document or a grammar, a dictionary…