neonlingo
NeonLingo is a Chrome and Edge extension that translates selected words, saves them, and highlights them again across webpages. Language learners, including people reading documentation, can build vocabulary through repeated exposure while browsing.
Who it's for
- Language learners who want to look up words and revisit them while reading webpages in Chrome or Edge.
- Developers reading English documentation who want on-page translation and automatic vocabulary saving.
- Learners who want target-language vocabulary inserted into familiar-language webpages through Bilingual Reading.
Not the right fit if…
- Learners who need a Safari or Firefox extension: the page lists Chrome and Edge support only.
How it fits your workflow
Install the extension in Chrome or Edge and browse webpages as usual. Select an unfamiliar word to see its translation directly on the page.
NeonLingo automatically saves looked-up words and highlights them when they reappear on other pages. In Bilingual Reading, selected words on native-language pages are replaced with target-language vocabulary while the rest of the sentence stays in the native language.
Sign in to use FSRS flashcards across devices. Premium adds AI translation that reads the whole sentence.
Pricing
Free: Free to use, with selection translation, a wordbook of up to 200 words, cross-site highlighting, and up to 200 interpretations per month. The page says no credit card is required.
Free
Free
- · Selection translation
- · Automatic wordbook with up to 200 words
- · Cross-site highlighting
- · Up to 200 interpretations per month
Premium
Price not stated on the supplied page content
- · Wordbook with up to 500 words
- · AI translation that reads the whole sentence
Prices checked on Oct 26, 2026 from the vendor's site. They can change; confirm before you buy.
Key features
- On-page word translation
- Select an unfamiliar word on a webpage to see its translation directly on the page, without copying it into another tab.
- Automatic wordbook
- Words looked up are saved automatically. The page lists a limit of 200 words on the free plan and 500 on Premium.
- Cross-site vocabulary highlighting
- NeonLingo highlights saved words when they appear again on webpages, supporting review through repeated encounters in context.
- Bilingual Reading
- On native-language pages, the extension substitutes selected words with target-language vocabulary chosen to be one step above the learner's level, while keeping the rest of the sentence in the native language.
- AI sentence translation
- Premium adds AI translation that considers the whole sentence.
- FSRS flashcards
- The page says users can sign in to use FSRS flashcards across devices.
Limitations to know
- The page lists Chrome and Edge as the supported browsers.
- The free wordbook is limited to 200 words and the free plan allows up to 200 interpretations a month.
- The Premium wordbook is listed as limited to 500 words.
- The supplied page content does not state Premium's price.
Alternatives to consider
-
LingQ
Choose it if you want a broader language-learning platform for reading, listening to, and importing content such as books, podcasts, videos, and articles.
Getting started
Google Chrome or Microsoft Edge.
- Install the extension using the Chrome or Edge link on the website.
- Select an unfamiliar word on a webpage to see its translation.
- Browse other pages to encounter saved words again through highlighting.
- Sign in if you want to use FSRS flashcards across devices.
Frequently asked questions
Is NeonLingo really free?
Yes. The free plan includes selection translation, a 200-word auto-wordbook, cross-site highlighting, and up to 200 interpretations a month, with no credit card required.
What is NeonLingo?
It is an AI language-learning Chrome extension that translates selected words while you browse, saves them automatically, and highlights them across sites.
Does NeonLingo work on Chrome and Edge?
Yes. The page says NeonLingo runs on Google Chrome and Microsoft Edge.
How many languages does NeonLingo support?
The page says NeonLingo supports 30 languages, covering major European and Asian languages.
How is NeonLingo different from Toucan?
According to the page, Toucan swaps words on a page but does not save them. NeonLingo saves looked-up words, highlights them wherever they reappear, and schedules spaced-repetition review.