Yunit – Companion Languag

A calm Chrome extension that quietly translates a few words on every page you read, so vocabulary travels with you across the web.

yunit reads alongside you. While you scroll through articles, watch a video with subtitles, or drift through a feed in another language, it picks a small handful of words you might not yet know and tucks a tiny translation above each one, the way a student pencils a note in a margin. The sentence stays intact, the line below stays open, and reading remains the priority.

You don't have to do anything for this to work. Read what you actually want to read, and the language slowly grows familiar from being seen. A vocabulary gathers in the background, each word held alongside the sentence it arrived in, and yunit threads these back into your reading at the moments they need to be seen again.

When you feel like leaning in, a single click on a word that stopped you cold opens everything you might want for it: a precise translation, the surrounding line, a definition, the sound of it spoken. Then it goes quiet again, and you keep reading. Give it more of your attention and the rhythm moves faster; give it less and the pace stays gentle. Either way, the words travel with you.

Reading

Annotations land where you are actually reading. A few per screen, the rest of the page left untouched. You set the density yourself, from a single annotation per screen up to a dense reading aid.

When you would rather see a passage in two languages, press Alt+Shift+D to switch into dual reading view. There are two modes: a quiet inline gloss under each line, and a side by side mirror where the original sits next to the translation in two columns.

Saving words and phrases

Click any annotated word and a small panel opens beside it, with the translation, the sentence the word came from, a definition, and a pronunciation icon. Save the word with one click and the sentence comes with it.

Select any text on the page, a phrase, a clause, a whole sentence, and yunit offers a translation in a small floating panel. From there you can save the phrase, or save the individual unknown words inside it. This works on any page where text is selectable.

Reviewing what you have saved

Saved words enter a spaced repetition schedule built into the extension. When a word is due, it shows up in your reading more often. The same panel doubles as a recall surface: simple "do I remember this" buttons feed the schedule. There is no separate flashcard app to open.

You can mark a word as known at any time and yunit will stop annotating it. Hover any saved word on a page to hear it spoken in your target language using your browser's built in voice.

YouTube lyrics

On YouTube videos, an optional lyrics panel fetches the song lyrics and aligns them to the timeline. As the song plays, each line is translated alongside the original. Premium adds a per line "sharpen" toggle that swaps in a language model translation for the lines where idioms or wordplay get lost in standard machine translation.

Per site control

Disable yunit on specific sites, or run it only on an allowlist. Useful for the page where you draft your own writing, the search results page where you do not want help, or the corner of the web that is in your own language already.

Free account, optional

The extension is fully usable with no account at all. Everything described above runs locally in your browser.

A free account adds two things: your settings (language pair, density, toggles) sync between devices, and your vocabulary is backed up to yunit.app once a day. If you sign in on a new device, your saved words restore from the backup.

Premium

Premium is nine dollars a month or seventy two dollars a year, and adds:

- Live multi device sync. Words you save on one device appear on the others in seconds.
- Sharper translations. A language model fills in for the cases where standard translation misses the meaning, both on individual words in the panel and on song lyrics in the lyrics panel.
- A highlights library. Your most recent saved sentences, gathered into a small collection on yunit.app.
- Early access to the web and mobile reading apps when they ship.

Thirty days money back, no questions, on every Premium subscription.

Privacy

yunit is local first by default. Your vocabulary, your spaced repetition history, and your settings live in your browser. We do not track which pages you visit. When the extension translates a word, it first tries an on device translator that runs entirely on your machine. If that is unavailable, it falls back to public translation services that receive only the text being translated, with no identity attached. Your saved vocabulary belongs to you and can be exported as a single JSON file at any time. Read the full privacy notice at yunit.app/privacy.

A small, attentive companion. The words you encounter, gathered patiently into a personal lexicon.