French vocabulary for looking after an animal: l'animal de compagnie, le chiot, le hamster, le perroquet, la tortue, le cochon d'Inde. Plus feeding, grooming and describing a symptom at the vet.
100 words–
–new–learning–known
Learn a language and expand your vocabulary from the content you love
Select unfamiliar words on any website, on YouTube or in a PDF. They’re saved with the sentence, turned into flashcards and brought back for training at the right time.
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https://wordbyword.io/demo
Nuances révélées par chaque mot
Apprendre des mots étrangers, c'est élargir délibérément son horizon intérieur. Chaque terme nouvellement acquis révèle une perspective insoupçonnée et transforme subtilement notre manière de percevoir le monde. À mesure que le lexique s'enrichit, la pensée gagne en justesse et en clairvoyance, en discernement, ouvrant la voie à une compréhension plus profonde et plus nuancée de la réalité qui nous entoure. Cette quête perpétuelle de savoir enrichit l' esprit...
63%
You understandthis page
1 · Meet new words
See the words you don’t know before you stumble on them
Spotlight highlights unfamiliar words right in the text of any website or PDF. Click one to see its translations and hear it in a natural human-like voice. Rate how well you know it, and the word is saved with its sentence and a link back to the exact spot where you found it.
Chrome extensionflâner
2 · And on YouTube
Translate YouTube subtitles with a hover
Turn on interactive subtitles in the player. Hover a word and the video pauses; click to see the translation and hear it spoken. The word is saved together with the line from the video.
YouTube translator
Laissez la sauce à feu doux pendant vingt minutes, puis incorporez le beurre.
mijoter
3 · Save with context
All your words in one vocabulary
Your vocabulary lives on the site: collections by language, topic or source. Import an old list from CSV, generate a set with AI or copy a ready-made one from the library. Statistics show your streak and how many words you have learned.
Vocabulary
4 · Repeat with ease
Flashcards that build themselves
A saved word is already a card: translation, the sentence from the source, audio and a picture if you want one. Flip through the deck in the player, listen without looking at the screen, mark how well you know each word.
Flashcards
flâner
6 · Understand more
Watch your share of known words grow
For any page or video you see what share of the words you already know. Based on your own vocabulary, not on an abstract difficulty label. Four zones tell you whether to start, and a hint shows which few words would add the most understanding.
How the score is calculated
Your level
Your sweet spot: you’ll follow the video and pick up new words
1,240words
12new
31learning
Most frequent new words
These 3 words add +2% understanding of this video
mijoter — to simmer×9
incorporer — to fold in×6
éplucher — to peel×4
Don’t start from an empty vocabulary
Take a ready-made collection from the library: the most common Spanish words, French from Netflix series, English for job interviews. Copy it to your account and it works in every exercise and flashcard right away.
- French vocabulary for crime and public safety: le crime, la police, le policier, l'enquêteur, le suspect, la victime, le témoin. Covers news coverage, the legal terms behind it and reporting an incident.150 words––new–learning–known
- Spanish vocabulary for crime and public safety: el delito, la policía, el agente, el sospechoso, la víctima, el testigo. Covers news coverage, the legal terms behind it and the language needed to report an incident at a station.150 words––new–learning–known
How it compares to courses and flashcard apps
| Course apps | Flashcard apps | WordByWord | |
|---|---|---|---|
| Words from what you read and watch | – | – | ✓ |
| Translation on any site, YouTube and PDF | – | – | ✓ |
| Sentence saved together with the word | – | by hand | ✓ |
| Flashcards with audio | partly | ✓ | ✓ |
| Spaced repetition | partly | ✓ | ✓ |
| Comprehension score for a page or video | – | – | ✓ |
| 50+ languages in one account | one at a time | ✓ | ✓ |
| Free plan | limited | ✓ | ✓ |
Course apps: Duolingo, Babbel, Busuu. Flashcard apps: Anki, Quizlet. Based on public feature descriptions, September 2026.
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Questions
Courses teach their own syllabus, Anki stores other people’s decks or ones you typed by hand. WordByWord takes words from what you already read and watch, keeps them with context and decides itself what to review first.
No. The extension is the fastest way to collect words, but you can also type them in, import a CSV, generate a set with AI or copy a collection from the library. Flashcards and trainings work the same either way.
Yes. Translations, vocabulary tracking and flashcards are free with no limits. Premium removes the monthly limits on trainings and AI generation and adds enhanced voiceover — see pricing.
Install the Chrome extension and sign in with your Google account — it takes a few seconds. Then open any website and start selecting words to translate and save them.
Yes. Hover over the subtitles and the video pauses; click a word to translate it and save it to a collection.
50+, from Spanish and Japanese to Icelandic and Swahili, several at once if you like. Here is the full list of supported languages.
Yes. We store your vocabulary and learning progress to run the app and never sell your data to third parties. Details are in the Privacy Policy.
Yes. Import words from CSV files and export collections to Anki, CSV or PDF, so your vocabulary is always portable.
Keep reading what you love, and let your vocabulary grow
Create a free account, open any page and save your first word.
Works on any site, YouTube and PDF