Browser Compatibility

Opera / GX
Recommended
Firefox / Zen
Recommended
Microsoft Edge
Recommended
Google Chrome
Full Support
Brave Browser
Full SupportBYOK & Zero-Access Security Guarantee
We Never Touch, See, or Log Your API Key
When you bring your own Google Gemini API key (BYOK), it is saved strictly in your local browser sandbox via chrome.storage.local. Our backend servers, developers, and third parties have zero access to it.
Saved only on your machine. Never synced to any remote database.
No tracking or proxying of your individual translation calls.
Dispatches straight from your browser to Google API with 0% markup.
- Get your free key: Visit Google AI Studio , log in with Google, and click Create API Key. (Google offers free generous daily quotas on
gemini-2.5-flash). - Open extension or Study Room: Open the Osmolangue popup or click the BYOK AI button in your Study Room header.
- Paste & save: Paste your key into the Personal Gemini Key field and click Test & Save. Osmolangue automatically validates the key.
All subsequent subtitle translations will run under your own unmetered key, bypassing all shared server limits.
Platform Video Field Guides
High-resolution, step-by-step Loom walkthroughs are being recorded for each supported streaming broadcaster. Each video will feature chapter scrubbers and live dialogue harvesting demonstrations.
Osmolangue (Watch and Learn)
Watch the official walkthrough demonstrating instant subtitle translation, slang breakdown, and vocabulary capture.
Japanese Subtitle Synchronization & Dialect Nuance Extraction
How to latch onto native Japanese subtitle tracks in Frieren and Jujutsu Kaisen with instant vocabulary banking.
Connecting to French European Public Broadcasters
Mastering fast Parisian speech and verlan backslang in Dix pour cent and Lupin.
Weimar Noir & Standard German Immersion
Navigating official German state mediatheken with frame-accurate subtitle timing.
Money Heist (Peninsular Spanish) & International Shows
Full screen overlay setup, custom subtitle font sizes, and 1-click flashcard syncing.
