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* InterfaceScrew: Long-time Duolingo fans will notice that the staff likes to screw with the way Duolingo teaches languages, often in forms of A/B tests, meaning that you are not sure if a feature is here to stay or even if your friend who uses Duolingo also has the feature. In particular, in 2017, a redesign of the website's lesson/practice feature aimed to bring together the code for the website and the apps so that they could be worked on as a unit.
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* SkillScoresAndPerks: When learning, each language has a "tree". It used to look like an actual skill tree in the past, but is now just a bunch of rows, each featuring from one to three skills, all of which must be completed before proceeding to the next row. Each skill typically contains from one to ten lessons, which give the user sentences with new words in them. After the tree is completed, one is given a "Golden Owl" marking that they have completed the course.
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Moved that to Accidental Innuendo.
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** French also has "the boy pleases the girls" and "it seems that he enters more easily".
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* GratuitousNinja: Danish has ninjas that work at night and play with children.
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* '''For English speakers''': Danish, Dutch, Esperanto, French, German, Irish, Italian, Norwegian (Bokmål), Polish, Portuguese, Russian, Spanish, Swedish, Turkish.
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* '''For English speakers''': Danish, Dutch, Esperanto, French, German, Irish, Italian, Japanese, Norwegian (Bokmål), Polish, Portuguese, Russian, Spanish, Swedish, Turkish.
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** Russian has "A wizard is never late" from ''Literature/TheLordOfTheRings''.
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** In German, [[https://www.duolingo.com/comment/11195604 "Ein Einhorn hat ein Horn."]] "Unicorn" translates literally to "one-horn", the sentence becomes "a one-horn has one horn".
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** German also teaches [[https://www.duolingo.com/comment/16396613 "Why does the bear conduct the orchestra?"]]
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* TalkingAnimal: Spanish has "¡Mi gato habla inglés!", which translates to "My cat speaks English!"
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* InspirationalInsult: Duolingo will happily throw sentences like "You are useless" (French) and "You learn nothing" (German) as part of its course content.
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** Vietnamese has "Be efficient, be polite, but always have a plan to kill anyone," a BadassBoast from James Mattis.
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** [[Franchise/TheHitchhikersGuideToTheGalaxy "So long and thanks for all the fish"]] is a potential sentence in the Vietnamese course.
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** Spanish: [[https://www.duolingo.com/comment/625546/ "I have thirteen cats."]]
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** Several languages make reference to ''WesternAnimation/{{Rejected}}''. "I am a banana!" can be one of the sentences encountered in the Dutch and German courses. "My spoon is too big!" can be encountered in French, Spanish, and Portuguese.
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** Several languages make reference to ''WesternAnimation/{{Rejected}}''. "I am a banana!" can be one of the sentences encountered in the Dutch and German courses. "My spoon is too big!" can be encountered in Dutch, French, Spanish, and Portuguese.
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** [[WesternAnimation/{{Rejected}} "I am a banana"]] can be one of the sentences encountered in the German course.
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** [[WesternAnimation/{{Rejected}} Several languages make reference to ''WesternAnimation/{{Rejected}}''. "I am a banana"]] banana!" can be one of the sentences encountered in the Dutch and German course.courses. "My spoon is too big!" can be encountered in French, Spanish, and Portuguese.
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* CrazyCatLady:
** German: [[https://www.duolingo.com/comment/11849304/ "By now we own eighteen cats!"]]
** German: [[https://www.duolingo.com/comment/11849304/ "By now we own eighteen cats!"]]
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** [[WesternAnimation/{{Rejected}} "I am a banana"]] can be one of the sentences encountered in the German course.
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** One of the numbers chosen for German's course is [[https://www.duolingo.com/comment/11120694 Zweiundvierzig]] (42). Later, the user can encounter the sentences [[https://www.duolingo.com/comment/10990550/ "The answer is 42."]] and [[https://www.duolingo.com/comment/10971300/ "The answer is 42. What is the question?"]] These sentences reference Creator/DouglasAdam's ''Franchise/TheHitchhikersGuideToTheGalaxy''.
to:
** One of the numbers chosen for German's course is [[https://www.duolingo.com/comment/11120694 Zweiundvierzig]] (42). Later, the user can encounter the sentences [[https://www.duolingo.com/comment/10990550/ "The answer is 42."]] and [[https://www.duolingo.com/comment/10971300/ "The answer is 42. What is the question?"]] These sentences reference Creator/DouglasAdam's Creator/DouglasAdams's ''Franchise/TheHitchhikersGuideToTheGalaxy''.
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* CulturalCrossReference:
** Norwegian: "Why is there a Swedish telemarketer in my bed?"
** Swedish: "Why is there a Norwegian architect lying in my bed?"
** Norwegian: "Why is there a Swedish telemarketer in my bed?"
** Swedish: "Why is there a Norwegian architect lying in my bed?"
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** One of the numbers chosen for German's course is [[https://www.duolingo.com/comment/11120694 Zweiundvierzig]] (42). Later, the user can encounter the sentences [[https://www.duolingo.com/comment/10990550/ "The answer is 42."]] and [[https://www.duolingo.com/comment/10971300/ "The answer is 42. What is the question?"]] These sentences reference Creator/DouglasAdam's ''Franchise/TheHitchhikersGuideToTheGalaxy''.
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* NoodleImplements: The Swedish course contains the sentence "The fairy tale is about two hedgehogs and a bar of soap."
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* LiteralMinded:
** From the German course: [[https://www.duolingo.com/comment/10932618 "Are two half-brothers one brother?"]]
** From the German course: [[https://www.duolingo.com/comment/10932618 "Are two half-brothers one brother?"]]
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Kinda-alphabetizing the examples list by language.
Deleted line(s) 48 (click to see context) :
** Irish ducks and Dutch birds apparently read the newspaper.
** Irish ducks and Dutch birds apparently read the newspaper.
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** Norwegian has some people hearing what a crab is singing.
** From Russian: "My horse is not an artist, but an architect."
** From Russian: "My horse is not an artist, but an architect."
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** German teaches "The bear drinks beer," although the sentence has the practical benefit of showing differences in phonemes.
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** Norwegian has some people hearing what a crab is singing.
** From Russian: "My horse is not an artist, but an architect."
** From Russian: "My horse is not an artist, but an architect."
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** One of the images corresponding to "the adventure" in German shows Carl Fredrickson and his house from ''WesternAnimation/{{Up}}''. "Adventure is out there!"
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* CompleteImmortality: The Spanish course has you translate "I cannot die".
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** Italian gives us [[Pixar/ToyStory Woody]]'s famous line, "Ho un serpente nello stivale".
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** Italian gives us [[Pixar/ToyStory [[WesternAnimation/ToyStory Woody]]'s famous line, "Ho un serpente nello stivale".
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* '''For Spanish speakers''': Catalan, English, French, German, Italian, Portuguese
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* '''For Spanish speakers''': Catalan, English, Esperanto, French, German, Italian, Portuguese
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* ARareSentence: Arguably one of the selling points is seeing what weird sentences you can find. A dedicated subreddit, [[https://www.reddit.com/r/shitduolingosays/ /r/ShitDuolingoSays]], exists purely to catalogue these sentences.
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[[folder: Courses Offered by Duolingo]]
* '''For English speakers''': Danish, Dutch, Esperanto, French, German, Irish, Italian, Norwegian (Bokmål), Polish, Portuguese, Russian, Spanish, Swedish, Turkish.
* '''For Spanish speakers''': Catalan, English, French, German, Italian, Portuguese
* '''For Russian speakers''': English, French, German, Spanish
* '''For German speakers''': English, French, Spanish
* '''For Italian speakers''': English, French
* '''For French speakers''': English, German, Italian, Spanish
* '''For Arabic speakers''': English, French, German
* '''For Portuguese speakers''': English, French, German, Spanish
* There are also some languages from which only an English course is available.
[[/folder]]
* '''For English speakers''': Danish, Dutch, Esperanto, French, German, Irish, Italian, Norwegian (Bokmål), Polish, Portuguese, Russian, Spanish, Swedish, Turkish.
* '''For Spanish speakers''': Catalan, English, French, German, Italian, Portuguese
* '''For Russian speakers''': English, French, German, Spanish
* '''For German speakers''': English, French, Spanish
* '''For Italian speakers''': English, French
* '''For French speakers''': English, German, Italian, Spanish
* '''For Arabic speakers''': English, French, German
* '''For Portuguese speakers''': English, French, German, Spanish
* There are also some languages from which only an English course is available.
[[/folder]]
** Dutch: "One does not drink meat."
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** Apparently Danish bears "eat rice with knife and fork" and can "take the man's wheels and run". Spanish bears prefer to drink beer, while Danish bears hand their beer to a cat. Danish birds also drink beer.
to:
** Apparently Danish bears "eat rice with knife and fork" and can "take the man's wheels and run". Dutch and Spanish bears prefer to drink beer, while Danish bears hand their beer to a cat. Danish birds also drink beer.
** Esperanto: "My grandfather likes that powder". Cocaine?
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* HeKnowsTooMuch: Implied in the Italian course, which features the ominous "He had found out too much.".
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* HeKnowsTooMuch: Implied in the Italian course, which features the ominous "He had found out known too much.".
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* ShapedLikeItself:
** The Esperanto course teaches "a good person is a person who is good".
** Irish: "The darkness is dark".
** The Esperanto course teaches "a good person is a person who is good".
** Irish: "The darkness is dark".
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* GuiltBasedGaming: If you're about to forget your daily practice and have notifications turned on, the game will remind you that "learning a language requires practice every day". If you end up neglecting your daily practice, you may get e-mails telling you that you have to make the owl happy by doing the exercises. Previous versions even showed you a ''crying'' owl when you failed to meet your goal.
* HeKnowsTooMuch: Implied in the Italian course, which features the ominous "He had found out too much.".
* HeKnowsTooMuch: Implied in the Italian course, which features the ominous "He had found out too much.".
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* PlayEveryDay: The game emphasizes the importance of practising every day and encourages it by keeping track of your "streak" - the number of consecutive days you reach your XP goal. Although you get 1 lingot for the 10th day in the streak, 2 for the 20th, etc., the main appeal of maintaining a streak seems to be bragging rights.
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* TheSociopath: In case you encounter one of them, the Spanish course includes the sentence "he does not have a conscience".
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* FlyInTheSoup: The Italian course teaches you how to say there's a ''mouse'' in your soup.
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* FlyInTheSoup: The Italian course teaches you how to say there's a ''mouse'' in your soup. It also features other results of sketchy hygiene standards, such as "your insects are on my plate", insects in the sugar and an ant dying in the sugar.
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** Irish ducks are apparently reading the newspaper. Danish ducks say "good morning".
** "The cat reads a book".
** Danish features chickens who read a book.
** "The cat reads a book".
** Danish features chickens who read a book.
to:
** Irish ducks are and Dutch birds apparently reading read the newspaper. newspaper.
** Danish ducks say (quack?) "goodmorning".
morning". Spanish ducks not only speak their own language, but know English as well.
** "The cat reads abook".
**book". According to the Danish features course, chickens who also read a book.book.
** Dutch dogs can ride a bike.
** Danish ducks say (quack?) "good
** "The cat reads a
**
** Dutch dogs can ride a bike.
** Italian teaches "I am an insect".
** From Dutch: "No, no pants, please".
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* MassiveNumberedSiblings: Italian features "We have eighty grandchildren".
to:
* MassiveNumberedSiblings: MassiveNumberedSiblings:
** Italian features "We have eightygrandchildren".grandchildren".
** Dutch gives you "They have 29 children".
** Italian features "We have eighty
** Dutch gives you "They have 29 children".
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* StuffedIntoTheFridge: Referenced in the Irish course, which gives us "The woman is in the fridge". Similarly, the Italian course has an engineer in the fridge.
to:
** "My name is Bond. Franchise/JamesBond."
* StuffedIntoTheFridge: Referenced in the Irish course, which gives us "The woman is in the fridge". Similarly, the Italian course has an engineer and a plumber in the fridge.
* StuffedIntoTheFridge: Referenced in the Irish course, which gives us "The woman is in the fridge". Similarly, the Italian course has an engineer and a plumber in the fridge.
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'''Note''': Unless otherwise noted, the courses mentioned are of the "___ for English speakers" type.
to:
* AnimateInanimateObject: Occasionally Duolingo teaches you how to describe what's going on if you encounter a normally-inanimate object doing something human:
** The Norwegian course features "the apple speaks Norwegian".
** From Danish: "The liver pate demands that the polar bear leaves the room".
** The Dutch course teaches you to greet juice, to say you're a banana, and how to excuse yourself on the ground that you're an apple.
** In case you ever find yourself suspecting that you are in possession of an intelligent and moral vehicle, the Dutch course teaches "does my car have a conscience?".
* BlatantLies: Some of the sentences don't fit the characters who speak them. It's for instance possible to get a middle-aged man saying that he's your granddaughter.
** The Norwegian course features "the apple speaks Norwegian".
** From Danish: "The liver pate demands that the polar bear leaves the room".
** The Dutch course teaches you to greet juice, to say you're a banana, and how to excuse yourself on the ground that you're an apple.
** In case you ever find yourself suspecting that you are in possession of an intelligent and moral vehicle, the Dutch course teaches "does my car have a conscience?".
* BlatantLies: Some of the sentences don't fit the characters who speak them. It's for instance possible to get a middle-aged man saying that he's your granddaughter.
** Esperanto features "I am not you".
** German teaches "Thursday is not a month" and "When I run, I am not standing".
** French has "England is not in Africa" and "Prisoners are in prison".
** German teaches "Thursday is not a month" and "When I run, I am not standing".
** French has "England is not in Africa" and "Prisoners are in prison".
* Catch22Dilemma: Possible case in German, which has "I am searching for the search engine". Good luck searching without a search engine to use...
* EvilLawyerJoke: Referenced in the Italian course, which teaches "Are we men or lawyers?".
* FlyInTheSoup: The Italian course teaches you how to say there's a ''mouse'' in your soup.
** Certain courses in the app have characters who speak the sentences. Some of them are animals, so you may encounter a German-speaking dolphin who says he knows English or a self-conscious bear asking how much he weighs.
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** Dutch teaches "the dog wears a coat".
to:
** Dutch teaches "the dog wears a coat".coat" and "the bear feels insulted because he didn't get an invitation".
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** French also has "the boy pleases the girls".
to:
** French also has "the boy pleases the girls".girls" and "it seems that he enters more easily".
* MassiveNumberedSiblings: Italian features "We have eighty grandchildren".
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** The Norwegian course has you translate "Film/{{The Force awakens}}".
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** The Norwegian course has you translate translating "Film/{{The Force awakens}}".
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** Norwegian and Swedish feature "It's raining men".
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** Spanish has "I'm the king of the world" from ''Film/{{Titanic}}''.
** Danish features "There is no spoon", a line from ''Film/TheMatrix''.
** Danish features "There is no spoon", a line from ''Film/TheMatrix''.
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Duolingo is a gamified language-learning platform created by a company of the same name. The application was first launched in beta as a website for a limited number of users on 30 November 2011 and was later fully launched on 19 June 2012. As of April 2016, it offers 59 different language courses across 23 languages; with 23 additional courses in development. The app is available on iOS, Android and Windows 8 and 10 platforms with over 120 million registered users across the world.\\
\\
You learn by progressing through a language tree consisting of various short lessons that are unlocked as you proceed. Most exercises are written translation exercises, but there are also optional dictation and speaking exercises. Completing lessons gives you ExperiencePoints and lingots - the Duolingo currency you can use to buy power-ups, tests and bonus skills.\\
\\
'''Note''': Unless otherwise noted, the courses mentioned are of the "___ for English speakers" type.
----
!!This gamified language learning platform provides examples of:
* BuffySpeak: There's a German skill named "Stuff". Upon completion, the game will greet you with the message that "You have learned Stuff". Even better, try strengthening it along with several others, and you'll get something like "You've strengthened Plurals, Comparison and Stuff".
* CaptainObvious:
** The French course teaches you that the snake is an animal. Similarly, the German course teaches you to say that your horse is an animal.
** The Swedish course teaches you to explain that a hospital is a building for sick people. It sounds even sillier in Swedish, where the word for "hospital" ''is a compound word meaning "building for sick people"''.
** You're taught to say "a table has no gender" in German. Note that this is false if you're talking about ''grammatical'' gender.
* CasualDangerDialogue: The Danish course has "A tiger is eating my husband", and Norwegian has "The wolf is eating me". As the sentences are read by a text-to-speech program, they sound disproportionately calm.
* EatingPetFood: The Swedish course features both "You're drinking my cat's milk" and "You're eating my dog's food".
* ExperiencePoints: Your progress is measured in experience points (XP).
* FourIsDeath: If you make four mistakes in a lesson using the heart system, you lose and have to start again.
* FunnyAnimal: Animals doing human stuff is a common theme.
** Apparently Danish bears "eat rice with knife and fork" and can "take the man's wheels and run". Spanish bears prefer to drink beer, while Danish bears hand their beer to a cat. Danish birds also drink beer.
** Irish ducks are apparently reading the newspaper. Danish ducks say "good morning".
** "The cat reads a book".
** Danish features chickens who read a book.
** Norwegian has some people hearing what a crab is singing.
** From Russian: "My horse is not an artist, but an architect."
** Dutch teaches "the dog wears a coat".
* GettingCrapPastTheRadar:
** The French course makes you translate "[[TeenyWeenie yours is small]]", while the Swedish course teaches you how to say "What a big sausage you have!".
** French also has "the boy pleases the girls".
** "[[YourCheatingHeart You need to get out of here before my husband arrives]]"
* GoldDigger: The Italian course has "She loves him for his wealth".
* ImplausibleDeniability: The Spirituality skill from Danish teaches you how to say "It's not my fault the alien steals my homework every day".
* MoodDissonance: For some languages, the app features characters who speak the sentences you're supposed to translate. Their mood doesn't always fit the sentence, so you'll occasionally bump into stuff like happy ladies who excitedly ask if you've come to kill them, or a smiling lumberjack who gives the thumbs up while informing you that he's lost his wife and has yet to recover his son.
* MoodWhiplash: The sentences range from mundane to hilarious or depressing. Getting them in certain orders will cause odd mood swings in the lesson. Some concrete examples:
** The Spirituality skill from Danish. One lesson is all about zombies, aliens, and vampires, with such delightful sentences such as "It’s not my fault [[ImplausibleDeniability the alien steals my homework every day]]", and the next lesson can hit you right after with "I bought a nice tombstone for my son’s grave".
** The Date and Time skill from Italian. It's full of mundane stuff like "Today is Monday", and then it suddenly throws "He dies in December" at you.
* NoDamageRun: When hearts were used for practice, you got a bonus for completing a lesson with all hearts intact.
* RuleOfThree: The heart system. You have three hearts and lose one for every mistake you make. If you get another question wrong, you lose.
* ShoutOut:
** Fittingly, the Italian course features the sentence "[[Franchise/SuperMarioBros Mario and Luigi]] are plumbers".
** Italian gives us [[Pixar/ToyStory Woody]]'s famous line, "Ho un serpente nello stivale".
** The Norwegian course has you translate "Film/{{The Force awakens}}".
** Norwegian references L'Oréal's slogan, "because I'm worth it".
** The symbol for the Spanish "To Be" skill is a skull, possibly referencing the famous "to be or not to be" scene in ''Theatre/{{Hamlet}}''.
* StuffedIntoTheFridge: Referenced in the Irish course, which gives us "The woman is in the fridge". Similarly, the Italian course has an engineer in the fridge.
* TextbookHumor: There are many odd sentences for you to translate. Ever wanted to ask a Norwegian why there's a Swedish telemarketer in your bed? Duolingo will teach you how!
* YourCheatingHeart: "You need to get out of here before my husband arrives".
* WordSaladHumor:
** "The bear gave birth to a duck" from the Danish course.
** "The green bears are invisible" from the German course.
\\
You learn by progressing through a language tree consisting of various short lessons that are unlocked as you proceed. Most exercises are written translation exercises, but there are also optional dictation and speaking exercises. Completing lessons gives you ExperiencePoints and lingots - the Duolingo currency you can use to buy power-ups, tests and bonus skills.\\
\\
'''Note''': Unless otherwise noted, the courses mentioned are of the "___ for English speakers" type.
----
!!This gamified language learning platform provides examples of:
* BuffySpeak: There's a German skill named "Stuff". Upon completion, the game will greet you with the message that "You have learned Stuff". Even better, try strengthening it along with several others, and you'll get something like "You've strengthened Plurals, Comparison and Stuff".
* CaptainObvious:
** The French course teaches you that the snake is an animal. Similarly, the German course teaches you to say that your horse is an animal.
** The Swedish course teaches you to explain that a hospital is a building for sick people. It sounds even sillier in Swedish, where the word for "hospital" ''is a compound word meaning "building for sick people"''.
** You're taught to say "a table has no gender" in German. Note that this is false if you're talking about ''grammatical'' gender.
* CasualDangerDialogue: The Danish course has "A tiger is eating my husband", and Norwegian has "The wolf is eating me". As the sentences are read by a text-to-speech program, they sound disproportionately calm.
* EatingPetFood: The Swedish course features both "You're drinking my cat's milk" and "You're eating my dog's food".
* ExperiencePoints: Your progress is measured in experience points (XP).
* FourIsDeath: If you make four mistakes in a lesson using the heart system, you lose and have to start again.
* FunnyAnimal: Animals doing human stuff is a common theme.
** Apparently Danish bears "eat rice with knife and fork" and can "take the man's wheels and run". Spanish bears prefer to drink beer, while Danish bears hand their beer to a cat. Danish birds also drink beer.
** Irish ducks are apparently reading the newspaper. Danish ducks say "good morning".
** "The cat reads a book".
** Danish features chickens who read a book.
** Norwegian has some people hearing what a crab is singing.
** From Russian: "My horse is not an artist, but an architect."
** Dutch teaches "the dog wears a coat".
* GettingCrapPastTheRadar:
** The French course makes you translate "[[TeenyWeenie yours is small]]", while the Swedish course teaches you how to say "What a big sausage you have!".
** French also has "the boy pleases the girls".
** "[[YourCheatingHeart You need to get out of here before my husband arrives]]"
* GoldDigger: The Italian course has "She loves him for his wealth".
* ImplausibleDeniability: The Spirituality skill from Danish teaches you how to say "It's not my fault the alien steals my homework every day".
* MoodDissonance: For some languages, the app features characters who speak the sentences you're supposed to translate. Their mood doesn't always fit the sentence, so you'll occasionally bump into stuff like happy ladies who excitedly ask if you've come to kill them, or a smiling lumberjack who gives the thumbs up while informing you that he's lost his wife and has yet to recover his son.
* MoodWhiplash: The sentences range from mundane to hilarious or depressing. Getting them in certain orders will cause odd mood swings in the lesson. Some concrete examples:
** The Spirituality skill from Danish. One lesson is all about zombies, aliens, and vampires, with such delightful sentences such as "It’s not my fault [[ImplausibleDeniability the alien steals my homework every day]]", and the next lesson can hit you right after with "I bought a nice tombstone for my son’s grave".
** The Date and Time skill from Italian. It's full of mundane stuff like "Today is Monday", and then it suddenly throws "He dies in December" at you.
* NoDamageRun: When hearts were used for practice, you got a bonus for completing a lesson with all hearts intact.
* RuleOfThree: The heart system. You have three hearts and lose one for every mistake you make. If you get another question wrong, you lose.
* ShoutOut:
** Fittingly, the Italian course features the sentence "[[Franchise/SuperMarioBros Mario and Luigi]] are plumbers".
** Italian gives us [[Pixar/ToyStory Woody]]'s famous line, "Ho un serpente nello stivale".
** The Norwegian course has you translate "Film/{{The Force awakens}}".
** Norwegian references L'Oréal's slogan, "because I'm worth it".
** The symbol for the Spanish "To Be" skill is a skull, possibly referencing the famous "to be or not to be" scene in ''Theatre/{{Hamlet}}''.
* StuffedIntoTheFridge: Referenced in the Irish course, which gives us "The woman is in the fridge". Similarly, the Italian course has an engineer in the fridge.
* TextbookHumor: There are many odd sentences for you to translate. Ever wanted to ask a Norwegian why there's a Swedish telemarketer in your bed? Duolingo will teach you how!
* YourCheatingHeart: "You need to get out of here before my husband arrives".
* WordSaladHumor:
** "The bear gave birth to a duck" from the Danish course.
** "The green bears are invisible" from the German course.
