Fluency
Choose the Language You’re Learning
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FluencyWords are ordered from most to least common. Pick a level where the words look new, then press Learn.
Smart Skip combines related forms and skips words you likely know, so you see fewer cards.
Your progress bar
Not studied yet.
Studied, not known yet. These come back in Practise.
Answered correctly.
Likely known, from your level estimate.
Set aside by Smart Skip.
These counts describe the selected level.
Not studied yet.
Studied, not known yet. These words come back in Practise.
Answered correctly and up to date.
Words you likely know, based on your level estimate.
Set aside by Smart Skip.
Another way to practise.
Practice modes and tools beyond everyday vocabulary.
Search the library or load any song from Spotify to translate and read line by line.
No songs found matching your search. Try pasting a Spotify link above.
Worked out from the tenses you picked — a verb that is irregular in the preterite can still be regular in the imperfect.
Before you answer, the verb is coloured to warn you when its form is unusual: green means it follows the normal rule, orange or red means it doesn’t. For example, tener is orange for yo (tengo) but green for nosotros (tenemos).
Each row is one stem alternation, derived from the
forms themselves. 0>g is the tengo group,
o>ue the puedo group.
From everyday speech and songs.
We found existing learning progress with this username and birthday:
Smart Skip uses languages you know to skip words you already understand, so you only study what’s new.
Skip words you’ve already learned in other languages you study (e.g. learn noche in Spanish → skip noite in Portuguese).
A few words do most of the talking in any language.
This app teaches those common words first, so you understand more, sooner.
You learn them from real speech and lyrics, not from a textbook list.
We’ll use an example card and only show features available for that language.
Filter cards before deck creation. Progress & assignments stay intact.
Most words in this set were new to you. A short check can help find whether an earlier starting point would suit you better.
Words that look similar and mean the same in English, like idea or familia.
Related forms, such as hablo, habló and hablar, share one flashcard.
Short function words, like me, te, se or dímelo.
Casual words and fillers, like pa, o sea or tipo.
People, places and brands, like Bad Bunny or Puerto Rico.
Adjust your main song deck, or explore supplementary vocabulary below.
Inflected forms are grouped by dictionary lemma. Cognate thresholds are determined by cross-language phonetic/orthographic scoring.
Words not shown as separate cards, with the reason for each choice.
Check up to 30 vocabulary groups sampled across the frequency range to find a useful starting level.
Think of a meaning before revealing. Count the word as known if you recalled one of its main meanings—even slowly or in different words. If a sentence is shown, judge the meaning used there.
Based on your answers:
A short check gives a useful range rather than an exact score.
Your starting point is still uncertain. You can start with a suggestion above, or answer up to 15 more questions to narrow it down.
Study keys work while a card is open and you’re not typing in a text field.
Every card in this session is shown below. Expand one to see this session’s attempts and all card-history timestamps retained by Progress.
Cards and lyric examples will come from the songs you select.
Choose a playlist. This app looks up lyrics, saves each song to your account, then builds a study deck from speech meanings plus your song lines.
0 of 0 songs
Each song is saved to your account as it lands, then a study deck is built from those lyrics.
Build a study deck from movie or series subtitles (e.g. La Casa de Papel). Dialogue lines are attached as examples with no WSD required.
You forget a new word within a day or two. You forget a word you have known for months far more slowly. Practise is scheduled to land just before you would have forgotten.
That is the whole idea: see each word about as often as you need to, and no more.
Copies a prompt built from the words you keep getting wrong, and opens ChatGPT so you can paste it in — using your own ChatGPT account, not this app's.
Look up any word in this language, including words that are not in the set you are studying.
Opens a search over the full vocabulary for this language. On a computer, press Cmd+F or Ctrl+F.
Turn this on if you want words you already got right to come back later, so they stay in memory. A correct word returns after 1 day, then 3, 7, 14, 30, 60, and 120 days. A mistake starts that wait over.
Leave it off if Practice should only hold words you just got wrong. Known words stay put and are not brought back on a timer.
Learn why this app is organised around frequency, context and finishable sets.
Manage lessons stored on this device and check whether your progress is safely synchronized.
Storage estimates include source JSON, but browser cache bookkeeping and migration space can require more. Removing content never removes progress.
Developer audit for the app build and vocabulary files loaded on this device.
Loose excludes only the most obvious look-alikes. Default balances confidence and coverage. Strict also excludes less certain cognate-like words, leaving a smaller study deck.
Words and phrases you’ve kept for later. Saving doesn’t add them to review. Stored on this device; export to keep a copy.
Nothing saved yet.
Open this site in Safari on your iPhone, then follow these four taps.
The square with an arrow, in the bar at the bottom.
The down arrow at the bottom of the list.
Scroll the list if you don’t see it straight away.
Fluency now opens from your home screen like an app.
Works in Safari on iPhone and iPad.
Paste one exact surface form per line for the selected language, or use UTF-8 CSV/TSV with
surface and optional lemma, last_correct,
and last_incorrect columns. Accents and punctuation distinguish cards;
lemma is accepted for interoperability but never used to match.
Existing newer answers, counts and review stages are preserved. A newer imported incorrect date stays in Review; rows without dates are marked correct now.
What is this?
This app teaches vocabulary from either subtitle speech or an artist's lyrics, starting with the most useful words.
Why frequency order?
Language follows a power law: a small number of words make up the vast majority of speech. By learning the most frequent words first, you understand more lyrics faster.
How are percentages calculated?
The coverage percentage tells you what fraction of all words in the lyrics you'd recognize. For example, at 70% coverage you know enough words to understand roughly 70% of the words in any song. The remaining 30% are rarer words that appear less often.
How does it work?
Choose the language you’re learning, then pick Everyday Speech or Music & Lyrics. Select a level to learn bite-sized sets of the most common words. Any cards you miss stay in review so you can master them.
The progress bar tracks your coverage based on the frequency of words you've learned — learning a common word contributes more to your coverage than a rare one.
Picking a set: Choose Everyday Speech or Music & Lyrics, then pick a level. This app automatically highlights your next unfinished set. Turn on Smart Skip so related forms share one flashcard and obvious look-alikes are skipped.
Learning and practice: Learn new contains only cards you have not attempted. Incorrect, partly learned, and scheduled cards move into Practice. Correct recalls return after 1, 3, 7, 14, 30, 60, and 120 days; mistakes reset the schedule.
Continuing: If you leave an unfinished set, a Welcome back prompt offers to restore the exact card, order, card side, and settings next time you enter. Finishing the set clears it.
Tap card to flip and see the translation
Swipe right if you know the word ✓
Swipe left if you don't know it ✗
Lyric examples: tap the sentence to cycle manually, or use the small desktop play control to hear each sense label and its timestamped lyric lines in order.
Words with multiple meanings: A grouped row starts on its shared meaning; pick a colored sub-sense to narrow the examples. Its color links it to the matching example.
Card scrubber: The number is your place in the set. Nudge the marker to move one card; keep dragging to skip farther.
Study options: Use the button beside the scrubber for the main menu, card language order, automatic speech, progress, and study preferences.
At the end of each set, you'll see your accuracy and can repeat mistakes from that session or continue to the next unseen set.