NeonLingo

It is a browser extension that provides in-context translation for words selected on any webpage, automatically saves lookups to a wordbook and re-highlights them across sites to support vocabulary retention without a separate study app. It is for self-directed consumers learning vocabulary who already read in or toward a target language and want practice integrated into daily browsing. It is delivered as a Chrome and Edge extension with a free tier and premium spaced-repetition and immersion features, working across 30 languages.

Key features

• Instant in-context word translation on selection
• Automatic wordbook saving of lookups
• Cross-site highlighting of saved words
• Spaced-repetition flashcards with FSRS
• Immersion mode swapping words to target language
• Support for 30 languages
• PDF reading and translation support
• English-English dictionary function