Duolingo Flashcards (2026): How They Work and What to Review Later
A Duolingo Flashcards round starts with five cards. Each card shows a word in the language you already know, and you have to say its translation in the language you are learning—or type it when speaking is inconvenient.
That small detail explains the feature better than the name does. This is not a personal vocabulary deck to browse whenever you like. It is a short active-recall exercise inside Duolingo lessons. A correct card disappears. A missed card shows and plays the answer, then returns at the back of the stack for another attempt.
For many learners, that is enough. If a few words keep slipping out of memory after the lesson, a second deck can help—but only for those recurring weak spots. Copying every word out of Duolingo would mostly create more work.
Facts checked: September 3, 2026.
How Duolingo Flashcards work
Duolingo's official Flashcards explanation describes this loop:
- A stack contains five cards, each with a word in your own language.
- You say the target-language translation aloud or type it.
- A correct card turns green and disappears from the stack.
- An incorrect card flips over, reveals the translation, plays it aloud, and moves to the back of the stack.
- Three correct answers are enough to pass the exercise.
- The round ends with a summary of what went well and what could use more practice.
Duolingo says Flashcards appear in lessons. Its 2026 guide to writing practice in the app also describes them as speaking-or-typing recall practice. The same guide lists Words separately in the Practice tab, where learners can revisit course vocabulary and match words with their meanings.
So if you are looking for Duolingo vocabulary flashcards, there are two different ideas to keep straight:
- Flashcards are the five-card recall exercise inside lessons.
- Words is a separate vocabulary practice area described by Duolingo for the Practice tab.
In other words, Flashcards and Words are not two names for the same screen: look in lessons for the five-card exercise and in the Practice tab for Words.
The in-app exercise and a long-term deck do different jobs
Duolingo Flashcards give you an immediate retrieval attempt around lesson vocabulary. A personal deck gives selected items somewhere to return over the following days and months.
| Question | Duolingo's five-card exercise | A learner-owned long-term deck |
|---|---|---|
| Where does it live? | Inside a Duolingo lesson | In the flashcard app you choose |
| What starts the review? | The lesson presents a five-card stack | Cards become due according to that app's schedule |
| What do you answer? | A translation into the language you are learning, spoken or typed | Whatever narrow prompt you write: a word, phrase, contrast, or correction |
| What happens after a miss? | The answer is revealed and played; the card returns to the back of the stack | You rate or repeat the card according to the app's review flow |
| What is it best at? | Quick recall practice while the lesson is still in context | Keeping personally important weak spots in review over time |
| Who controls the card text? | Duolingo supplies the exercise | You can edit, delete, split, and rewrite the card |
One is not a replacement for the other. The five-card round can be the whole workflow. A separate deck earns its place only when it preserves something you would otherwise keep losing.
When Duolingo alone is enough
You probably do not need a second deck when:
- the words come back reliably in later lessons;
- one correction is enough for the mistake to make sense;
- the Words practice and ordinary lesson path already give you enough retrieval;
- you meet the same vocabulary through reading, conversation, or class;
- maintaining another queue would displace actual language use.
Saving zero cards after a good session is a valid result.
A personal deck is more useful when the same item fails repeatedly, the correction exposes a specific misunderstanding, or the phrase matters to a conversation you expect to have. This is a filter, not a backup of the course.
What is worth reviewing later
After a lesson, look for signals rather than categories of content. A card is a stronger candidate when at least one of these is true:
- It has failed more than once. You recognize the answer after seeing it, but cannot produce it when asked.
- The correction changed your understanding. You used the wrong preposition, gender, conjugation, or word order and now know exactly why.
- Two similar forms keep colliding. A small contrast would prevent the same mistake next time.
- You want to produce the phrase outside the app. It belongs in a message, a trip, a class, or a conversation you actually care about.
- The prompt can stay narrow. You can test one clear thing without copying a whole explanation.
Skip a word when it was merely new, funny, or briefly confusing. Exposure is not a commitment to review it for months.
A selective workflow after each session
The workflow should take a few minutes, not turn a Duolingo lesson into data entry.
1. Finish the lesson before taking notes
Stay in the exercise while you are answering so note-taking does not break the recall flow. Sort the possible cards afterward.
At the end, use the summary and your own memory to identify the awkward items. If nothing stands out, stop there.
2. Keep it to a small batch
If several corrections are worth keeping, 3–8 items is already a full batch. Treat that as a working range, not a quota or a scientific limit. Count the whole lesson or study session, not only one five-card stack. An ordinary session might produce one item or none.
Record only enough context to understand the correction later:
cita = appointment; forgot it again
depender de; used the wrong preposition
se me olvidaron las llaves = I forgot my keys
por/para: gift intended for Ana
This manual capture is deliberate. It does not scrape Duolingo or bulk-copy a course, and it does not require an export or API. The small amount of friction forces a useful decision: is this item important enough to become another review?
3. Turn each note into one retrieval task
Raw corrections are rarely finished flashcards. Rewrite each one so there is a clear expected answer.
| Raw signal from the lesson | Weak card | Better card | What it tests |
|---|---|---|---|
You forgot la cita again |
Front: “Lesson vocabulary” / Back: a list of ten words | Front: Tengo una ___ con el dentista. / Back: cita |
One recurring word in context |
You used the wrong preposition after depender |
Front: “Explain Spanish prepositions” / Back: a grammar paragraph | Front: Todo depende ___ resultado. / Back: del — Todo depende del resultado. |
One preposition and contraction in context |
| You want to keep the corrected “I forgot my keys” pattern | Front: the entire corrected dialogue / Back: its translation | Front: “Using se me, say: I forgot my keys.” / Back: Se me olvidaron las llaves. |
One useful production pattern |
You confused por and para |
Front: “por vs para” / Back: every rule | Front: Este regalo es ___ Ana. / Back: para |
One concrete contrast |
The exact card direction depends on your goal. If speaking is the problem, put the meaning or situation on the front and produce the target language. If reading is the problem, show the target-language phrase and ask for its meaning. You can keep both directions for an important item, but do not duplicate everything automatically.
For more card patterns, see How to Use Flashcards for Language Learning.
4. Check the card before scheduling it
Read both sides without the lesson around them. Ask:
- Is there one defensible answer?
- Does the card test the mistake I actually made?
- Is the example natural and complete enough to understand?
- Will I care about this phrase a month from now?
- Did I preserve an accent, article, or grammatical detail that changes the answer?
If a prompt allows several equally good translations, add context or narrow it. “Say still in Spanish” is underspecified; the best translation changes with meaning. A full prompt such as “She is still here” makes the target clearer.
5. Review the small deck, then keep deleting
Once the cards are clear, let your chosen spaced-repetition app schedule them. Delete or rewrite a card when reviews reveal that the prompt is vague, the answer is too large, or the item no longer matters.
Watch the due queue rather than chasing a perfect intake number. If adding cards after every lesson makes tomorrow's reviews annoying, capture less. How Many New Flashcards Per Day explains that workload tradeoff in more detail.
Where FSRS fits—and where it cannot help
For this workflow, keep the two layers separate. Duolingo's official Flashcards explanation describes the active-recall exercise and its retry loop. In a separate deck that uses FSRS, the flashcard app records your reviews and the scheduler uses that history to calculate when each saved card should return.
That is useful for uneven memory. la cita may become easy quickly, while depender de keeps causing trouble. They do not need to return on the same fixed timetable.
FSRS cannot rescue a bad card.
It can schedule “Explain every use of por and para” very precisely, but the prompt will still be too broad. It can bring back an ambiguous translation more often, but repetition will not make the question less ambiguous. Card quality comes first; scheduling comes after it.
For the scheduler itself, read What Is FSRS?. For prompt design, use How to Make Better Flashcards.
Do you need a Duolingo flashcards export?
Not for this workflow. The point is to move a few decisions, not a vocabulary database.
Finish the session, choose the recurring misses, and enter those items manually in the review app you already use. This makes the process independent of any export route and avoids turning “Duolingo flashcards export” into a hunt for a bulk pipeline you may not need.
If your destination is Anki, build the selected cards in Anki. A Duolingo to Anki workflow does not have to be more complicated than that. If Anki already holds your language decks, there is no reason to change apps for these new cards.
If you want a new learner-owned deck elsewhere, the same card-selection rules still apply. Do not move five lesson words merely because there were five cards on the screen. Move only the items that proved they need longer attention.
Where Flashcards Open Source App fits
Disclosure: I am Kirill Markin, and I build Flashcards Open Source App.
Flashcards is one place to keep the learner-owned half of this workflow. The hosted app lets you create and review cards, use AI chat with workspace data and file attachments, and schedule reviews with FSRS. The repository is open source, and there is a documented self-hosting path.
For this Duolingo workflow, manual entry is usually enough. AI can help split a correction or rewrite an awkward prompt, but it should not decide which lesson vocabulary deserves long-term review. You make that choice because you know what you missed and what you want to say.
The Getting Started guide covers the hosted app, agent setup, and self-hosted route. If you already have a review system that works, keep it and apply the same selective process there.
The practical answer
Duolingo Flashcards are short five-card recall rounds: see a word in your language, produce the target-language translation, and retry missed cards within the exercise. They fit naturally inside a lesson and may be all the vocabulary review you need.
Build a second deck only for the residue: recurring misses, corrections that changed your understanding, and phrases you genuinely want to produce later. Keep the capture manual, turn each item into one clear prompt, and let FSRS schedule the result.
Duolingo keeps the exercise close to the lesson. Your own deck keeps a small number of useful weak spots available for longer review. That division is simple enough to maintain—and selective enough to remain useful.