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Click the + Add word button from the dashboard or Words page. You can also import an existing Anki deck (.apkg file) or a CSV file from the Words → Import screen.

Yes — Language Den is a web app and your account keeps your vocabulary synced and accessible from any browser. Sign-up takes about 30 seconds.

Any language you can type. There is no fixed list. Spanish, Japanese, Korean, Arabic, Thai, Welsh, Swahili, Esperanto — it doesn't matter. If your keyboard can produce the characters, Language Den can teach you the words.

Yes, and it's built in — no API keys or setup required. When you add a word, Language Den automatically fills in the translation. You can also generate full flashcard content (definitions, example sentences, conjugations) with a single click.

AI translation and flashcard generation include a generous fair-use allowance each month — about $2 of provider cost per account. Normal study won't hit it. You can always add and edit flashcards manually if you ever reach the allowance.

Language Den uses large language models via an AI gateway. The specific model may change as better options become available, but the experience stays the same for you.

Yes. Language Den includes built-in image search powered by Unsplash. Search for a photo, click to attach — no API key needed.

Yes. Language Den imports .apkg files directly. Export your deck from Anki as an .apkg file, then use Words → Import words → Anki deck. Your cards come with you.

A CSV with a word column is enough — you’ll map columns on the next step. Translation and part of speech are optional. Any other columns are stored as metadata.

Yes — the triage queue lets you accept or skip words you've added, and Notebook lets you capture words rapidly and process them into flashcards later.

Language Den uses FSRS (Free Spaced Repetition Scheduler), a modern open-source algorithm that outperforms the SM-2 algorithm used by traditional Anki. It adapts your review intervals based on your actual performance over time.

• Again — you forgot the word; it will be shown again soon
• Hard — you remembered, but it was difficult
• Good — you remembered correctly with reasonable effort
• Easy — you remembered effortlessly; the next interval will be longer

Whatever feels sustainable. Even 10 minutes a day of consistent review will compound significantly over months. The algorithm handles scheduling — you just show up.

Your vocabulary data is stored securely on our servers. It's accessible from any browser as long as you're signed in to your account.

We show no ads and do not use third-party analytics vendors. We do run first-party product analytics (Ahoy) on our own servers to understand sign-up and learning funnels. Details are in the Privacy Policy.

Yes. Go to Profile & Settings and use the delete account option. This permanently removes all your data from our servers.

Yes. On the Words page click Export CSV, or go to Profile & Settings → Data export. The file includes every word in your active study language and is compatible with CSV import.