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AI · alternatives · 2026

24 alternatives to Learn Japanese contextually while browsing

Hi HN, Just wanted to share a tool i've been working on to help with my own study routine. It’s a browser extension called Lingoku. The idea is simple: we spend hours browsing the web in English every day. This tool replaces some of the english words with Japanese vocabulary based on your japanese level (Similar to Toucan, but with a better user experience). It’s basically an attempt to make the "i+1" method actually passive, you understand the sentence because it's mostly english, but you pick up Japanese words naturally from the context. It uses an LLM in the backend to make sure the…

Lingoku is a browser extension that helps Japanese learners acquire vocabulary passively while browsing the web. It replaces selected English words with Japanese vocabulary matched to the user's proficiency level… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1
    Fluent▲821

    Learn a new language by browsing the web

    2020 · fluent.co · its alternatives →

  2. 2
    Toucan▲595

    Learn a new language while you browse the web.

    2020 · jointoucan.com · its alternatives →

  3. 3GA

    Hi HN, For over two years I've been working on an App to learn languages (currently French, Italian and Spanish), together with my partner, a language teacher. I think it is finally ready to share with this community! The idea is to introduce vocabulary and grammar whilst you read eBooks in your own language. I've found that it is easier to remember vocabulary 'in context' and with regular repetition. Plus you don't have to carve out dedicated time for language learning. Other apps require you to build a habit around various exercises or ‘games’, whereas lots of people already read books.…

    2024 · glossarie.app · its alternatives →

  4. 4IM

    The idea is actually quite simple. As a Japanese learner and a coder, I've always wanted there to be an open-source, 100% free for learning Japanese, similar to Monkeytype in the typing community. Unfortunately, pretty much all language learning apps are closed-sourced and paid these days, and the ones that are free have unfortunately been abandoned. But of course, just creating yet another language learning app was not enough - there has to be a unique selling point. And then I thought to myself: why not make it crazy and do what no other language learning app ever did by adding a gazillion…

    2025 · kanadojo.com · its alternatives →

  5. 5

    Learn a new language while you live your life

    2021 · fluent.co · its alternatives →

  6. 6

    Improve your language skills while writing online

    2021 · its alternatives →

  7. 7
    Mainichi▲112

    Learn Japanese each time you open a new tab

    2015 · mainichi.me · its alternatives →

  8. 8
    Kann▲173

    Master Japanese vocabulary you care about!

    2024 · kann.app · its alternatives →

  9. 9

    Learn your Duolingo vocabulary while browsing the web

    2023 · duoninja.com · its alternatives →

  10. 10

    Hey HN, it’s been 8 years since I posted on here about the launch of my Japanese dictionary app Nihongo [0] and I’m finally back with a new app: Nihongo Lessons! Think of Nihongo Lessons as the textbook to Nihongo’s dictionary. It’s an app for learning Japanese, specifically made for learners who are serious about becoming fluent, and want a guided set of content that will help them efficiently acquire vocabulary and grammar. The project came about when Adam Shapiro of Japanese Level Up (Jalup) [1] announced last April that he was shutting Jalup down. As a fan of Adam’s work I was bummed to…

    2022 · lessons.nihongo-app.com · its alternatives →

  11. 11

    Learn Japanese with clarity, context, and confidence

    2025 · kazunavi.com · its alternatives →

  12. 12

    Language learning anywhere: from Apple Watch to the Mac

    2020 · apps.apple.com · its alternatives →

  13. 13

    Learn Japanese with Anime

    2025 · chromewebstore.google.com · its alternatives →

  14. 14AF

    I'm a long time lurker that recently quit my job to work on my own projects, a lot due to the inspiration from Hacker News. Now I have published my first serious project, an app for learning how to write Japanese characters. It's the app I always wanted but couldn't find when I was studying. It tries to be simple to use, you just start the quiz and go with the flow. There's no need to plan and manage your studies, and it uses spaced repetition for better retention. There's a promo page with more details up at http://www.kanjibyhand.com. It's only for Android so far. The free version includes…

    2012 · kanjibyhand.com. · its alternatives →

  15. 15
    Fluensa▲117

    Make the entire internet a space for language learning

    2025 · its alternatives →

  16. 16
    Mainichi▲133

    Learn Japanese, one prefecture at a time.

    Jul 2026 · mainichiapp.com · its alternatives →

  17. 17
    Underline▲133

    Expand your vocabulary while you browse the Internet

    2022 · getunderline.io · its alternatives →

  18. 18
    Lexios▲76

    Learn vocabulary effortlessy while browsing the web

    2021 · its alternatives →

  19. 19

    Read & listen to native Japanese and Chinese, tap any word

    Jul 2026 · apps.apple.com · its alternatives →

  20. 20

    Hi! Wanted to share the project I really wanted to have. TLDR; this app lets you create your own list of words and you get a Duolingo-like experience (kind of, still needs a lot of features) practicing those words in their context. My English is not the best but not the worst either. But I realized I can't boost it up after a certain level! In my belief, in order to truly learn a language, you need to be exposed to that language often. Vocabulary is the key factor here if you really want to improve in any language. My experience is that when I read a book to improve my English vocabulary, I…

    2025 · github.com · its alternatives →

  21. 21

    Turn anything into a language lesson, instantly

    2022 · roshi.ai · its alternatives →

  22. 22
    Wordwise▲114

    Hey HN, While learning Danish, I kept translating the same words over and over. I’d take notes, highlight books, save things in random places… then lose track of it all. I wanted something simple. Translate a word, save it with context, and review it later so it actually sticks. Nothing I found really did that. So I built my own app. It lets you: - Translate and save words instantly - Add notes, tags, example sentences, gender, even emojis - Review everything with flashcards using spaced repetition - Track how many words you’ve really learned - Use it fully offline with on-device ML Kit…

    2025 · getwordwise.app · its alternatives →

  23. 23

    I quit my job last year and worked mostly on this full SwiftUI rewrite of my Japanese reading app, Manabi Reader. The rewrite gave me the opportunity to expand to macOS (and without Catalyst so it feels extra native) and redo the data layer to be offline-first via Realm with iCloud sync. The biggest differentiators compared with other language study apps are that it tracks every word/kanji you read so that you can see how much of a given webpage/article you're already familiar with and other features/analytics built on that foundation; it automatically builds a personal corpus…

    2023 · reader.manabi.io · its alternatives →

  24. 24

    Read Japanese kana in two weeks

    Aug 2026 · kanasensei.dev · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →