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Duolingo Wiki

Language Courses.png

When you create your Duolingo account, you must choose a language course that will teach you your target language in your base language.

Choosing a course[]

To start learning a course, click on the flag icon next to your username in the blue bar at the top of the screen or go directly to the courses page.

Base language[]

Please note that learning from a language means that the entire website will be in that language. This is your base language. If you switch from learning from one base language to another base language, the website will change to reflect the new base language, and will hide the progress belonging to any of your other base language courses. For example: if you are an English speaker learning German and you switch to learning French from Spanish, the language of the website will change to Spanish. You will not be able to see your progress on English to German until you switch your base language back to English.

The courses page will give you quick links to all the languages available from your currently set base language. To change your base language and see what other learning options are available, use the "I speak:" pull-down menu.


A course is a language tree, and in the case of the English base language, four target languages have stories.


Duolingo's language courses are created and maintained in the Incubator by volunteers and language experts with the assistance of staff.[1] Some of these courses are also a result of a partnership between Duolingo and organizations such as the Peace Corps[2].

A listing of all available and in-development courses can be found at the Incubator website. Course information can also be found on the courses page and in the course list, though these may not include all courses or be completely up-to-date. 


The following are statistics related to the courses currently in the incubator. A description of what each specific course phase means can be found here.

Number of courses per language
AvailableTo learn
(40 languages)
Japanese(02)Chinese(02)Indonesian(01)Norwegian (Bokmål)(01)Guarani(01)Polish(01)Swahili(01)Ukrainian(01)Arabic(01)Scottish Gaelic(01)
Vietnamese(01)Klingon(01)Catalan(01)Dutch (Netherlands)(01)Yiddish(01)Hawaiian(01)Danish(01)Turkish(01)Irish(01)Hungarian(01)
Welsh(01)Navajo(01)Hebrew(01)Hindi(01)Romanian(01)Latin(01)Greek (modern)(01)Czech(01)High Valyrian(01)Finnish(01)
For speakers of
(23 languages)
English(37)Spanish(10)Portuguese(06)Chinese(06)French(06)Russian(04)Arabic(04)Italian(04)Dutch (Netherlands)(03)Turkish(03)
Indonesian(01)Greek (modern)(01)Czech(01)
To learn
(12 languages)
English(05)Swedish(02)Chinese(01)Spanish(01)Esperanto(01)Māori(01)German(01)Italian(01)Haitian Creole(01)Ukrainian(01)
For speakers of
(12 languages)
Volunteer Courses Statistics
Phase 1Phase 2Phase 3
Number of courses (118)171091
One course entering the phase every (average days)253131
INCUBATION STATISTICSPhase 1Phase 2Phase 2Phase 3Phase 1Phase 3
Average duration349217539
Fastest original courseSpanishFrench (31)EnglishScottish Gaelic (14)EnglishScottish Gaelic (146)
Fastest reverse coursePortugueseSpanish (27)EnglishChinese (1)EnglishChinese (58)
Fastest new target languageEnglishNavajo (43)EnglishChinese (1)EnglishChinese (58)
Fastest new source languageTurkishEnglish (44)ThaiEnglish (40)TurkishEnglish (181)
Languages entering www.duolingo.com per year
YearTarget languagesSource languages
2019LatinScottish GaelicArabic
2017JapaneseChineseKoreanCzechHigh ValyrianSwahiliThai
2016HungarianWelshHebrewRomanianGuaraniVietnameseGreek (modern)
2015RussianTurkishEsperantoUkrainianNorwegian (Bokmål)PolishCatalan
2014IrishDanishSwedishDutch (Netherlands)VietnameseIndonesianJapaneseChinesePolishRomanianHungarianHindi
UkrainianKoreanArabicGreek (modern)Czech
2013FrenchRussianGermanTurkishDutch (Netherlands)
Languages entering the incubator per year
YearTarget languagesSource languages
2019LatinScottish GaelicFinnish
2017JapaneseChineseHaitian CreoleArabic
2016KoreanHigh ValyrianBengaliTagalogTeluguPunjabiTamil
2015WelshHebrewHindiCzechYiddishVietnameseNorwegian (Bokmål)Guarani
SwahiliIndonesianKlingonCatalanGreek (modern)
Dutch (Netherlands)PolishUkrainian
ArabicGreek (modern)
JapaneseChineseDutch (Netherlands)IndonesianTurkishHungarianRomanian

See also[]


  1. Incubator
  2. How the Peace Corps teamed up with Duolingo to create language courses. http://technical.ly/dc/2016/06/03/peace-corps-duolingo-language-courses/