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{{Star article}}

[[File:Duolingo logo (2019).svg|thumb|300px|Duolingo's current logo]]
[[File:Luis von Ahn.jpg|thumb|200px|Luis von Ahn]]

'''Duolingo''' is a website to learn languages for free. It was released on November 30, 2011. Currently the site offers courses in 28 languages. The most used are [[English language|English]], [[Spanish language|Spanish]], [[French language|French]], [[Italian language|Italian]], [[Portuguese language|Portuguese]] and [[Dutch language|Dutch]]. It also has an application for [[iOS]], [[Android]], [[Windows Phone]] and [[Chrome OS]].

== History ==
The project was initiated by the professor Luis von Ahn and the postgraduate student Severin Hacker. In its development, it used principally the programing language [[Python]],<ref>[http://www.quora.com/What-language-is-Duolingo-written-in/ What language is Duolingo written in]</ref> and with him participated Antonio Navas, Vicki Cheung, Marcel Uekermann, Brendan Meeder, Hector Villafuerte and Jose Fuentes.

== Working methodology ==
To participate in the courses, the user must create an account with an active and valid email address, where the user will receive the confirmation. Users are periodically sent reminders to practice the language. The user also can help to translate web pages and others documents.<ref>[http://www.technologyreview.com/news/423894/translating-the-web-while-you-learn/ Translating the Web While You Learn]</ref> It is important to have backing material such as dictionaries.

== Services ==
=== Translations ===
In addition to courses, Duolingo provides to its users a space where can apply the knowledge gained through text translation. People can only access this space through the website and not through phones applications.
=== Duolingo Test Center ===
On July 22, 2004, Duolingo released Duolingo Test Center, a platform of an official English certification. This can be done in the website, iOS or Android, where the tests are supervised through camera and microphone. The tests require 20 minutes, cost $20 [[American dollar]]s<ref>[http://www.latimes.com/business/technology/la-fi-tn-duolingo-test-center-20140722-story.html/ Duolingo offers language-certification tests via mobile devices]</ref> and qualifies the student from a note of 0-10.

=== Duolingo for Schools ===
Duolingo is used increasingly in classrooms. For example, in [[Costa Rica]] and [[Guatemala]], Duolingo has been used in public schools as a pilot project carried out by the government. In January 2015, Duolingo launched a project entitled [https://schools.duolingo.com/ Duolingo for Schools], in order to provide teachers a control panel through which they can follow the progress of their students in a particular language. The board helps the teacher to understand the weaknesses and strengths of each student individually.<ref>[http://techcrunch.com/2015/01/08/duolingo-launches-free-language-learning-platform-for-schools/ Duolingo Launches Free Language Learning Platform For Schools]</ref>

== List of languages for English speakers ==

Duolingo has multiple languages available for English speakers (Including 3 which are constructed or fictional), and more are currently in development.

=== Currently released ===

{{div col|colwidth=20em}}
* [[Arabic]]
* [[Czech]]
* [[Danish]]
* [[Dutch]]
* [[Esperanto]] ([[constructed language]])
* [[French]]
* [[Finnish]]
* [[German]]
* [[Greek]]
* [[Haitian Creole]] (Currently in Beta)
* [[Hawaiian]]
* [[Hebrew]]
* [[High Valyrian]] (fictional language)
* [[Hindi]]
* [[Hungarian]] (Currently in Beta)
* [[Indonesian]]
* [[Italian]]
* [[Irish]]
* [[Japanese]]
* [[Klingon]] (fictional language) (Currently in Beta)
* [[Korean]]
* [[Mandarin Chinese]]
* [[Navajo]] (Currently in Beta)
* [[Norwegian]]
* [[Polish]]
* [[Portuguese]] (Brazilian Portuguese)
* [[Romanian]]
* [[Russian]]
* [[Scots Gaelic]]
* [[Spanish]] (Latin American Spanish)
* [[Swahili]]
* [[Swedish]]
* [[Ukrainian]]
* [[Vietnamese]]
* [[Welsh]]
* [[Yiddish]] (Currently in Beta)
* [[Zulu]]
{{div col end}}

=== Hatching ===

"Hatching" means the course is still in development.

* [[Xhosa]]

=== Unavailable for English speakers ===

Duolingo has courses available for speakers of other languages as well, but Duolingo courses for non-English speakers are very limited, with most of the available languages only offering English as a course. All other available languages offer English as a course.

However, the Guarani and Catalan courses are only available for Spanish speakers, which has the most available courses for speakers of non-English languages, with 9.

=== List of courses for speakers of non-English languages ===

{{div col|colwidth=30em}}
* Arabic: English, French, German, Swedish, Spanish (Hatching)
* Bengali: English (Hatching)
* Chinese: English, Spanish, French (Hatching)
* Czech: English
* Dutch: English
* French: English, Spanish, Italian, German, Portuguese
* German: English, Spanish, French
* Greek: English
* Hindi: English
* Hungarian: English
* Indonesian: English
* Italian: English, French, German, Spanish (Hatching)
* Japanese: English
* Korean: English
* Polish: English
* Portuguese: English, Spanish, French, German, Italian, Esperanto
* Punjabi: English (Hatching)
* Romanian: English (Hatching)
* Russian: English, German, French, Spanish, Swedish (Hatching)
* Spanish: English, French, Italian, Portuguese, German, Catalan, Guarani, Esperanto, Russian
* Tagalog: English (Hatching)
* Tamil: English (Hatching)
* Telugu: English (Hatching)
* Thai: English
* Turkish: English, German, Russian, French (Hatching)
* Ukranian: English
* Vietnamese: English
{{div col end}}

== References ==
<references />

== Links ==
*[https://www.duolingo.com/ Official website]
*[https://schools.duolingo.com/ Duolingo for Schools]
*[https://testcenter.duolingo.com/ Duolingo Test Center]

{{Portal Society}}

[[Category:Websites]]

[[fr:Duolingo]]
[[wp:Duolingo]]

Duolingo - Revision history

mh:wikigenius>Parvej Husen Talukder: 1 revision imported

mh:wikigenius>DaneGeld: /* Unavilable for English speakers */ minor. Typo correction