NeonLingo
Translate, save, and review vocabulary while reading in Chrome or Edge, with free and paid usage tiers.
About NeonLingo
NeonLingo is a Chrome and Edge extension that turns everyday web reading into vocabulary practice. Select an unfamiliar word to see a context-aware translation; the extension saves it to a personal wordbook and highlights it when it appears on later pages. It supports 30 languages and keeps lookup inside the page instead of sending text to a separate translation tab. The free version includes automatic highlighting, Microsoft-powered translation, a 200-word vocabulary list, up to 200 interpretations per month, foreign-document word translation, and basic flashcards. Premium raises the limits and adds DeepL and AI translation with phonetic transcription, cloud sync for vocabulary and settings, custom highlight colors, and cross-device FSRS flashcards. Premium+ removes the listed vocabulary-storage and monthly-interpretation limits and adds higher-priority technical support. NeonLingo is suited to people who routinely read news, blogs, documentation, or forums in another language and want vocabulary capture embedded in that habit. It requires Chrome or Edge, while the broader translation, synchronization, and spaced-repetition workflow sits behind a paid plan.
Best for
Best use cases
Translate unfamiliar words without leaving the current webpage
Re-encounter saved vocabulary through highlights across later webpages
Use FSRS flashcards across devices with a Premium subscription
Compare before choosing
The free version keeps core translation and highlighting available at no cost
Premium adds cloud sync, higher limits, DeepL and AI translation, and FSRS review
Premium+ suits heavier use by removing the listed vocabulary and interpretation limits
Features
Translate while reading
Select unfamiliar words on webpages to see an in-context translation without moving text into another tab.
Build a vocabulary list
Save looked-up words automatically and see them highlighted again when they reappear on later webpages.
Review words with flashcards
Use basic flashcards on the free plan or cross-device FSRS review on Premium to revisit saved vocabulary.
Pros
- In-page translation removes the need to copy unfamiliar words into a separate tab
- Automatic wordbook saving and repeat highlighting connect lookup with later reading
- A free version includes core translation, highlighting, vocabulary, and flashcard functions
Cons
- The extension workflow is limited to Chrome and Edge rather than all browsers
- Free accounts are limited to 200 saved words and 200 monthly interpretations
- Cloud sync, DeepL and AI translation, and cross-device FSRS review require Premium
Pricing Plans
Free Version
- Automatic word highlighting on web pages
- Microsoft Translation Engine
- Support for multiple languages
- Vocabulary list storage for up to 200 words
- Up to 200 interpretations per month
- Word translation and highlighting in foreign-language documents
- Basic flashcard features
Premium
- All Free Version features
- DeepL and AI translation with phonetic transcription and up to 1,000 uses per month
- Vocabulary list storage for up to 500 words
- Up to 1,000 vocabulary translations per month
- Up to 1,000 same-language interpretations per month
- Cloud synchronization for the vocabulary list and settings
- Customizable word-highlighting colors
- FSRS flashcards available across devices
Premium+
- All Premium features
- Unlimited vocabulary list storage
- Unlimited monthly interpretations
- Unlimited same-language interpretations per month
- High-priority response from the technical team
* Pricing information is for reference only. Please refer to the latest announcement on NeonLingo's official website.