| French | 23 | Babbel, Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingoda, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Speak, Tandem, uTalk |
| Italian | 23 | Babbel, Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingoda, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Speak, Tandem, uTalk |
| Spanish | 23 | Babbel, Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingoda, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Speak, Tandem, uTalk |
| German | 22 | Babbel, Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingoda, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Japanese | 21 | Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Speak, Tandem, uTalk |
| Korean | 21 | Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Speak, Tandem, uTalk |
| Portuguese | 21 | Babbel, Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Russian | 21 | Babbel, Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| English | 20 | Babbel, Busuu, Cambly, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Ling, Lingoda, Lingopie, LingQ, Lingvist, Mango Languages, Mondly, Preply, Rosetta Stone, Tandem, uTalk |
| Polish | 19 | Babbel, Busuu, Clozemaster, Drops, Duolingo, Glossika, italki, Ling, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Chinese | 18 | Busuu, Clozemaster, Drops, Duolingo, FluentU, Glossika, HelloTalk, italki, Lingopie, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Speak, Tandem |
| Dutch | 18 | Babbel, Busuu, Clozemaster, Drops, Duolingo, Glossika, italki, Ling, Lingopie, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Rosetta Stone, Tandem, uTalk |
| Turkish | 18 | Babbel, Busuu, Clozemaster, Drops, Duolingo, Glossika, HelloTalk, italki, Ling, Lingopie, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Rosetta Stone, Tandem, uTalk |
| Arabic | 17 | Busuu, Clozemaster, Drops, Duolingo, Glossika, HelloTalk, italki, Ling, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Swedish | 17 | Babbel, Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Danish | 16 | Babbel, Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Tandem, uTalk |
| Hindi | 16 | Clozemaster, Drops, Duolingo, Glossika, HelloTalk, italki, Ling, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Greek | 15 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, Lingopie, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Rosetta Stone, Tandem, uTalk |
| Hebrew | 15 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, Lingopie, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Rosetta Stone, Tandem, uTalk |
| Indonesian | 14 | Babbel, Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Tandem, uTalk |
| Norwegian | 14 | Babbel, Drops, Duolingo, Glossika, italki, Ling, LingQ, Lingvist, Mango Languages, Memrise, Mondly, Pimsleur, Tandem, uTalk |
| Ukrainian | 13 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Memrise, Mondly, Pimsleur, Tandem, uTalk |
| Vietnamese | 13 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Rosetta Stone, Tandem, uTalk |
| Finnish | 12 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Tandem, uTalk |
| Hungarian | 12 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Tandem, uTalk |
| Persian | 12 | Drops, Glossika, italki, Ling, LingQ, Mango Languages, Memrise, Pimsleur, Preply, Rosetta Stone, Tandem, uTalk |
| Swahili | 12 | Clozemaster, Drops, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Memrise, Pimsleur, Tandem, uTalk |
| Thai | 12 | Clozemaster, Drops, Glossika, HelloTalk, italki, Ling, Mango Languages, Memrise, Mondly, Pimsleur, Tandem, uTalk |
| Croatian | 11 | Clozemaster, Drops, Glossika, italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Tandem, uTalk |
| Czech | 11 | Clozemaster, Duolingo, Glossika, italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Tandem, uTalk |
| Icelandic | 11 | Clozemaster, Drops, Glossika, italki, LingQ, Mango Languages, Memrise, Pimsleur, Preply, Tandem, uTalk |
| Romanian | 11 | Clozemaster, Drops, Duolingo, italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Tandem, uTalk |
| Armenian | 10 | Clozemaster, Glossika, italki, Ling, LingQ, Mango Languages, Pimsleur, Preply, Tandem, uTalk |
| Catalan | 10 | Clozemaster, Drops, Glossika, italki, Ling, LingQ, Mondly, Preply, Tandem, uTalk |
| Irish | 10 | Clozemaster, Drops, Duolingo, Glossika, Ling, Mango Languages, Pimsleur, Rosetta Stone, Tandem, uTalk |
| Latin | 9 | Clozemaster, Duolingo, italki, LingQ, Mango Languages, Mondly, Rosetta Stone, Tandem, uTalk |
| Lithuanian | 9 | Clozemaster, Glossika, italki, Ling, Mondly, Pimsleur, Preply, Tandem, uTalk |
| Serbian | 9 | Clozemaster, Drops, Glossika, italki, Ling, LingQ, Mango Languages, Tandem, uTalk |
| Slovak | 9 | Clozemaster, Glossika, italki, Ling, LingQ, Mango Languages, Mondly, Tandem, uTalk |
| Urdu | 9 | italki, Ling, LingQ, Mango Languages, Mondly, Pimsleur, Preply, Tandem, uTalk |
| Afrikaans | 8 | Clozemaster, italki, Ling, LingQ, Mondly, Preply, Tandem, uTalk |
| Bengali | 8 | Clozemaster, Glossika, italki, Ling, Mango Languages, Mondly, Tandem, uTalk |
| Bulgarian | 8 | Clozemaster, Glossika, italki, Ling, LingQ, Mondly, Tandem, uTalk |
| Estonian | 8 | Clozemaster, Drops, Glossika, italki, Ling, Lingvist, Tandem, uTalk |
| Gaelic | 8 | Clozemaster, Duolingo, Glossika, italki, LingQ, Mango Languages, Tandem, uTalk |
| Latvian | 8 | Clozemaster, Glossika, italki, Ling, Mondly, Preply, Tandem, uTalk |
| Tagalog | 8 | Clozemaster, Drops, Glossika, LingQ, Mondly, Pimsleur, Preply, uTalk |
| Albanian | 7 | Clozemaster, italki, Ling, Pimsleur, Preply, Tandem, uTalk |
| Cantonese | 7 | Clozemaster, Drops, Glossika, Ling, LingQ, Tandem, uTalk |
| Esperanto | 7 | Clozemaster, Drops, Duolingo, italki, LingQ, Tandem, uTalk |
| Georgian | 7 | Clozemaster, Glossika, italki, Ling, LingQ, Tandem, uTalk |
| Kazakh | 7 | Clozemaster, Glossika, italki, Mango Languages, Preply, Tandem, uTalk |
| Mongolian | 7 | Glossika, italki, Ling, Memrise, Preply, Tandem, uTalk |
| Slovenian | 7 | Clozemaster, italki, Ling, LingQ, Memrise, Preply, uTalk |
| Welsh | 7 | Clozemaster, Drops, Duolingo, Glossika, italki, Tandem, uTalk |
| Yoruba | 7 | Drops, italki, Ling, Memrise, Preply, Tandem, uTalk |
| Amharic | 6 | Clozemaster, italki, Ling, Preply, Tandem, uTalk |
| Azerbaijani | 6 | Clozemaster, Glossika, Mango Languages, Preply, Tandem, uTalk |
| Basque | 6 | Clozemaster, Drops, italki, Preply, Tandem, uTalk |
| Belarusian | 6 | Clozemaster, Glossika, italki, LingQ, Tandem, uTalk |
| Bosnian | 6 | Drops, italki, Ling, Preply, Tandem, uTalk |
| Gujarati | 6 | italki, Ling, LingQ, Preply, Tandem, uTalk |
| Khmer | 6 | italki, Ling, LingQ, Preply, Tandem, uTalk |
| Malay | 6 | italki, LingQ, Mango Languages, Preply, Tandem, uTalk |
| Malayalam | 6 | italki, Ling, Mango Languages, Preply, Tandem, uTalk |
| Punjabi | 6 | italki, Ling, LingQ, Mango Languages, Pimsleur, Tandem |
| Telugu | 6 | italki, Ling, Mango Languages, Preply, Tandem, uTalk |
| Yiddish | 6 | Clozemaster, Duolingo, italki, Mango Languages, Preply, Tandem |
| Burmese | 5 | italki, Ling, Preply, Tandem, uTalk |
| Filipino | 5 | italki, Ling, Mango Languages, Rosetta Stone, Tandem |
| Galician | 5 | Clozemaster, Drops, italki, Tandem, uTalk |
| Haitian Creole | 5 | Duolingo, Mango Languages, Pimsleur, Tandem, uTalk |
| Hawaiian | 5 | Drops, Duolingo, Mango Languages, Tandem, uTalk |
| Kannada | 5 | italki, Ling, Preply, Tandem, uTalk |
| Lao | 5 | italki, Ling, Preply, Tandem, uTalk |
| Macedonian | 5 | Clozemaster, italki, LingQ, Tandem, uTalk |
| Maori | 5 | Clozemaster, Drops, italki, Tandem, uTalk |
| Pashto | 5 | Ling, Mango Languages, Pimsleur, Tandem, uTalk |
| Tamil | 5 | italki, Ling, Mango Languages, Tandem, uTalk |
| Uzbek | 5 | Glossika, italki, Mango Languages, Tandem, uTalk |
| Igbo | 4 | Drops, Mango Languages, Tandem, uTalk |
| Javanese | 4 | italki, Mango Languages, Tandem, uTalk |
| Kinyarwanda | 4 | italki, Preply, Tandem, uTalk |
| Luxembourgish | 4 | italki, Preply, Tandem, uTalk |
| Maltese | 4 | italki, Preply, Tandem, uTalk |
| Marathi | 4 | italki, Ling, Tandem, uTalk |
| Nepali | 4 | italki, Ling, Tandem, uTalk |
| Samoan | 4 | Drops, italki, Tandem, uTalk |
| Sinhala | 4 | italki, Preply, Tandem, uTalk |
| Xhosa | 4 | italki, Preply, Tandem, uTalk |
| Zulu | 4 | Duolingo, italki, Tandem, uTalk |
| Breton | 3 | Clozemaster, Tandem, uTalk |
| Cebuano | 3 | italki, Tandem, uTalk |
| Cornish | 3 | Clozemaster, Tandem, uTalk |
| Dzongkha | 3 | Mango Languages, Tandem, uTalk |
| Greenlandic | 3 | Drops, Tandem, uTalk |
| Klingon | 3 | Duolingo, italki, Tandem |
| Kurdish | 3 | Glossika, italki, Tandem |
| Kyrgyz | 3 | italki, Tandem, uTalk |
| Malagasy | 3 | italki, Tandem, uTalk |
| Ojibwe | 3 | italki, Pimsleur, Tandem |
| Shanghainese | 3 | Mango Languages, Tandem, uTalk |
| Sindhi | 3 | italki, Tandem, uTalk |
| Somali | 3 | italki, Tandem, uTalk |
| Tatar | 3 | italki, Preply, Tandem |
| Tibetan | 3 | italki, Preply, uTalk |
| Turkmen | 3 | italki, Tandem, uTalk |
| Ainu | 2 | Drops, Tandem |
| Assamese | 2 | Tandem, uTalk |
| Berber | 2 | Tandem, uTalk |
| Cherokee | 2 | Mango Languages, Tandem |
| Corsican | 2 | Tandem, uTalk |
| Dari | 2 | Mango Languages, uTalk |
| Farsi | 2 | Clozemaster, Mondly |
| Fijian | 2 | Tandem, uTalk |
| Flemish | 2 | italki, uTalk |
| Hakka | 2 | Glossika, uTalk |
| Hausa | 2 | Tandem, uTalk |
| Hmong | 2 | italki, Tandem |
| Ilocano | 2 | Tandem, uTalk |
| Kirundi | 2 | Tandem, uTalk |
| Ladino | 2 | Tandem, uTalk |
| Lingala | 2 | Tandem, uTalk |
| Luganda | 2 | Preply, uTalk |
| Luo | 2 | italki, Tandem |
| Manx | 2 | Glossika, uTalk |
| Nahuatl | 2 | Clozemaster, Tandem |
| Navajo | 2 | Duolingo, Tandem |
| Neapolitan | 2 | Tandem, uTalk |
| Occitan | 2 | Clozemaster, Tandem |
| Oromo | 2 | Tandem, uTalk |
| Papiamento | 2 | Tandem, uTalk |
| Potawatomi | 2 | Mango Languages, Tandem |
| Sanskrit | 2 | italki, uTalk |
| Sardinian | 2 | Tandem, uTalk |
| Scots | 2 | Tandem, uTalk |
| Shona | 2 | Tandem, uTalk |
| Sicilian | 2 | Tandem, uTalk |
| Slovene | 2 | Glossika, Tandem |
| Southern Sotho | 2 | Tandem, uTalk |
| Tajik | 2 | italki, Tandem |
| Tamazight | 2 | italki, Preply |
| Tigrinya | 2 | Tandem, uTalk |
| Tok Pisin | 2 | Tandem, uTalk |
| Toki Pona | 2 | Clozemaster, Tandem |
| Tswana | 2 | Tandem, uTalk |
| Tumbuka | 2 | Tandem, uTalk |
| Uyghur | 2 | italki, Tandem |
| Valyrian | 2 | Duolingo, Tandem |
| Wolof | 2 | Tandem, uTalk |
| Abkhaz | 1 | Tandem |
| Acholi | 1 | Tandem |
| Adyghe, West Circassian | 1 | Tandem |
| Afar | 1 | Tandem |
| Akan | 1 | Tandem |
| Alsatian | 1 | uTalk |
| American | 1 | uTalk |
| American Sign Language | 1 | Tandem |
| Antillean Creole | 1 | Tandem |
| Apachean | 1 | Tandem |
| Arabic Egyptian | 1 | uTalk |
| Arabic Gulf | 1 | uTalk |
| Arabic Lebanese | 1 | uTalk |
| Arabic Moroccan | 1 | uTalk |
| Aromanian | 1 | Tandem |
| Asturian | 1 | Tandem |
| Australian Sign Language, Auslan | 1 | Tandem |
| Austrian Sign Language | 1 | Tandem |
| Avar | 1 | Tandem |
| Aymara | 1 | Tandem |
| Azeri | 1 | italki |
| Balinese | 1 | Tandem |
| Balochi | 1 | Tandem |
| Bambara | 1 | Tandem |
| Bashkir | 1 | Tandem |
| Bavarian | 1 | Tandem |
| Bemba | 1 | Tandem |
| Bhojpuri | 1 | Tandem |
| Bihari | 1 | Tandem |
| Bislama | 1 | Tandem |
| Brazilian Sign Language | 1 | Tandem |
| British Sign Language | 1 | Tandem |
| Cape Verdean Creole | 1 | Tandem |
| Chaldean | 1 | Mango Languages |
| Chamorro | 1 | Tandem |
| Chavacano | 1 | Tandem |
| Chechen | 1 | Tandem |
| Chewa, Nyanja | 1 | Tandem |
| Chhattisgarhi | 1 | Tandem |
| Chibemba | 1 | uTalk |
| Chichewa | 1 | uTalk |
| Chinese Mandarin | 1 | uTalk |
| Chinese Sign Language | 1 | Tandem |
| Chinese Simplified | 1 | Ling |
| Chinese Traditional | 1 | Ling |
| Chittagonian | 1 | Tandem |
| Choctaw | 1 | Tandem |
| Chti | 1 | Drops |
| Chuvash | 1 | Tandem |
| Cree | 1 | Tandem |
| Dakhini | 1 | Tandem |
| Dargwa | 1 | Tandem |
| Dhundari | 1 | Tandem |
| Dothraki | 1 | Tandem |
| Dutch Sign Language | 1 | Tandem |
| Emoji | 1 | Tandem |
| English Australian | 1 | uTalk |
| English Canadian | 1 | uTalk |
| English Cockney | 1 | uTalk |
| English Indian | 1 | uTalk |
| English Plus | 1 | Mango Languages |
| English Scottish | 1 | uTalk |
| Ewe | 1 | Tandem |
| Faroese | 1 | Tandem |
| French Canadian | 1 | uTalk |
| French Sign Language | 1 | Tandem |
| Friulian | 1 | Tandem |
| Fula, Fulani | 1 | Tandem |
| Ga | 1 | Tandem |
| Ganda | 1 | Tandem |
| German Sign Language | 1 | Tandem |
| German Swiss | 1 | uTalk |
| Greek Ancient | 1 | uTalk |
| Guaranà | 1 | Tandem |
| Guarani | 1 | Clozemaster |
| Hani | 1 | Tandem |
| Herero | 1 | Tandem |
| Hiligaynon, Ilonggo | 1 | Tandem |
| Hiri Motu | 1 | Tandem |
| Hokkien | 1 | Tandem |
| Ido | 1 | Tandem |
| Indo-Pakistani Sign Language | 1 | Tandem |
| Ingush | 1 | Tandem |
| Interlingua | 1 | Tandem |
| Interlingue | 1 | Clozemaster |
| International Sign Language | 1 | Tandem |
| Interslavic | 1 | Tandem |
| Inuktitut | 1 | Tandem |
| Italian Sign Language | 1 | Tandem |
| Jamaican Patois | 1 | Tandem |
| Japanese Sign Language | 1 | Tandem |
| Jerriais | 1 | uTalk |
| Kabardian, East Circassian | 1 | Tandem |
| Kachchi | 1 | uTalk |
| Kalmyk | 1 | Tandem |
| Kanuri | 1 | Tandem |
| Karelian | 1 | Tandem |
| Kashmiri | 1 | Tandem |
| Kashubian | 1 | Tandem |
| Kikuyu | 1 | Tandem |
| Komi | 1 | Tandem |
| Kongo | 1 | Tandem |
| Konkani | 1 | Tandem |
| Korean Sign Language | 1 | Tandem |
| Krio | 1 | Tandem |
| Kumyk | 1 | Tandem |
| Kurdish Kurmanji | 1 | uTalk |
| Kurdish Sorani | 1 | uTalk |
| Lak | 1 | Tandem |
| Lanna | 1 | Tandem |
| Laz | 1 | Tandem |
| Lezgian | 1 | Tandem |
| Ligurian | 1 | Tandem |
| Lingua Franca Nova | 1 | Tandem |
| Lojban | 1 | Clozemaster |
| Lombard | 1 | Tandem |
| Lozi | 1 | Tandem |
| Luba-Kasai | 1 | Tandem |
| Madurese | 1 | Tandem |
| Magahi | 1 | Tandem |
| Maithili | 1 | Tandem |
| Malaysian | 1 | Ling |
| Malaysian Sign Language | 1 | Tandem |
| Maldivian, Dhivehi | 1 | Tandem |
| Mandalorian | 1 | Tandem |
| Mandarin Chinese Traditional | 1 | Clozemaster |
| Mapuche | 1 | Tandem |
| Marshallese | 1 | Tandem |
| Mauritian Creole | 1 | Tandem |
| Maya | 1 | Tandem |
| Meitei | 1 | Tandem |
| Mexican Sign Language | 1 | Tandem |
| Minangkabau | 1 | Tandem |
| Mingrelian | 1 | Tandem |
| Mon | 1 | Tandem |
| Montenegrin | 1 | Tandem |
| Mossi | 1 | Tandem |
| Nkore | 1 | Tandem |
| Northern Ndebele | 1 | Tandem |
| Northern Sotho | 1 | Tandem |
| Norwegian Bokmål | 1 | Clozemaster |
| Nuosu | 1 | Tandem |
| Odia | 1 | Tandem |
| Okinawan | 1 | Tandem |
| Oriya | 1 | uTalk |
| Ossetian | 1 | Tandem |
| Ovambo | 1 | Tandem |
| Pashtu | 1 | italki |
| Penang | 1 | uTalk |
| Pidgin Nigerian | 1 | uTalk |
| Piedmontese | 1 | Clozemaster |
| Pirate | 1 | Mango Languages |
| Polish Sign Language | 1 | Tandem |
| Portuguese Brazil | 1 | Mondly |
| Portuguese Brazilian | 1 | uTalk |
| Punjabi Indian | 1 | uTalk |
| Punjabi Pakistani | 1 | uTalk |
| Quechua | 1 | Tandem |
| Quechua Cuzco | 1 | uTalk |
| Quenya | 1 | Tandem |
| Quichua | 1 | italki |
| Réunion Creole | 1 | Tandem |
| Rajasthani | 1 | Tandem |
| Rohingya | 1 | Tandem |
| Romani | 1 | Tandem |
| Romansh | 1 | Tandem |
| Russian Sign Language | 1 | Tandem |
| Rusyn | 1 | Tandem |
| Saami Southern | 1 | uTalk |
| Sami | 1 | Tandem |
| Sango | 1 | Tandem |
| Sanskrit for Yoga | 1 | Drops |
| Sanskrit, Saá¹ská¹›tam | 1 | Tandem |
| Santali | 1 | Tandem |
| Saraiki | 1 | Tandem |
| Seychellois Creole | 1 | Tandem |
| Sindarin | 1 | Tandem |
| Sioux | 1 | Tandem |
| Sorbian | 1 | Ling |
| Southern Ndebele | 1 | Tandem |
| Spanish Argentinian | 1 | uTalk |
| Spanish Sign Language | 1 | Tandem |
| Sranan Tongo | 1 | Tandem |
| Sundanese | 1 | Tandem |
| Swazi | 1 | Tandem |
| Sylheti | 1 | Tandem |
| Syriac | 1 | Tandem |
| Tabasaran | 1 | Tandem |
| Tahitian | 1 | Tandem |
| Taiwanese Mandarin | 1 | LingQ |
| Taiwanese Taigi | 1 | Glossika |
| Tajiki | 1 | uTalk |
| Talysh | 1 | Tandem |
| Tetum | 1 | Tandem |
| Tongan | 1 | Tandem |
| Tsonga | 1 | Tandem |
| Turkish Sign Language | 1 | Tandem |
| Tuvan | 1 | Mango Languages |
| Twi | 1 | Pimsleur |
| Udmurt | 1 | Tandem |
| Venda | 1 | Tandem |
| Venetian | 1 | Tandem |
| Walloon | 1 | Tandem |
| Wenzhounese (Wu) | 1 | Glossika |
| Western Frisian | 1 | Tandem |
| Yakut | 1 | Tandem |
| Yucatec Mayan | 1 | uTalk |
| Zaza | 1 | Tandem |
| Zhuang | 1 | Tandem |