The short version
Alison Translator collects no personal information. There is no account, no sign-up, no analytics, and no tracking of any kind. The extension has no server of its own — nothing is ever sent to its author.
What moves, and what doesn't
Caption text
To translate a lesson, its caption text is sent to a translation service along with the target language. Nothing accompanies it — no identifier, no account, no page address, no browsing history.
Settings and transcripts
- Settings — language, voice speed, volume levels, which features are on.
- Transcripts — for each lesson you open, the original caption lines, their translations, and their timestamps.
- Translation cache — lines already translated, so the same line is never translated twice.
All of it lives in your browser's local extension storage. It is not uploaded anywhere, not synced between your devices, and not readable by the author or anyone else.
Where requests go
| Host | What is sent | Why |
|---|---|---|
| translate.googleapis.com | Caption text, target language | Translates the captions. The default service. |
| api.mymemory.translated.net | Caption text, target language | Fallback, used only when the Google endpoint is unavailable. |
| player.vimeo.com captions.vimeo.com |
Nothing — a download only | Fetches the lesson's caption file: the same file the video player already loads to display captions. |
The translation services handle those requests under their own policies — Google and MyMemory.
The spoken translation
The voice-over is produced by the speech voices already installed in your operating system, through the browser's built-in speech interface. No audio is recorded, and no text is sent anywhere to generate the sound.
Where the extension runs
The part that adds subtitles runs only on alison.com lesson pages. A second, much smaller script loads inside every player.vimeo.com frame — including Vimeo players embedded on other sites — but it stays silent there: it replies only to a direct request from the page that embedded it, and only an Alison lesson page ever sends one. When it does reply it hands back the address of that video's caption file and nothing more. It reads nothing else, and reports to nowhere else.
Removing your data
- One lesson Open the Library page and click Delete on it.
- Cached translations Click Clear translation cache in the extension's popup.
- Everything Remove the extension from chrome://extensions. Chrome deletes all of its stored data at that point.
Children
The extension is a study aid for an online course platform and is not directed at children under 13. It collects nothing from anyone.
Changes to this policy
If this policy changes, the date at the top changes with it, and the new version ships with the extension update.