December 16, 2025
From i+1 to i+fight
Show HN: Learn Japanese contextually while browsing
Fans cheer, purists jeer: a romaji vs furigana showdown for this Japanese-on-the-web tool
TLDR: An AI browser tool swaps a slice of your web text to Japanese and lets you hover for meaning. Commenters love the idea but brawl over romaji vs furigana, flag spacing and audio bugs, and ask for wider browser support—while veterans say similar extensions have existed for years.
An AI-powered browser add-on just hit Hacker News, promising to sprinkle just-right Japanese into your everyday reading so you learn as you scroll—no drills, just hover-and-go. It’s based on “comprehensible input,” the idea that learning clicks when you understand most of what you read and only a little is new. The pitch is slick: i+1 difficulty, instant translations, clean design, no ads. But the comments? A full-on language learning soap opera. The romaji vs furigana battle kicked off fast: purists argued any “serious learner” should see pronunciation in Japanese script (furigana), not Latin letters (romaji), while casuals shrugged, saying romaji is friendlier for newbies. Then came Space-gate: one user complained there’s literally no space between normal text and the highlighted Japanese words, setting typo alarms off. A Firefox user reported the audio voice sounds like it’s speaking the wrong language, which turned into a cross-browser grievance thread. Old-school veterans chimed in with history: “We’ve seen this before,” name-dropping Language Immersion, Polyglot, and MindTheWord, plus a DIY extension from 12 years ago, implying the idea is cool but hardly new. Support for more browsers? People want it, yesterday. The mood: excited but picky—everyone wants Japanese-by-osmosis, but they demand it with proper spacing, proper script, and proper pronunciation.
Key Points
- •Lingoku.AI is an AI-driven browser extension that teaches Japanese contextually using the “i+1” comprehensible input approach.
- •Users get instant hover translation (claimed 0.2s) and pronunciation while browsing, with multi-language support (JP-EN-CN-KR).
- •Onboarding involves a 30-second install and personalization of goals (JLPT/Daily/Anime) and level, then normal browsing.
- •The tool integrates contextual learning, spaced repetition, and incidental learning, replacing about 10% of content to maintain comprehension.
- •A cloud LLM powers deep context analysis, polysemy recognition, and kanji/radical breakdown, with claims of encrypted, non-stored data and no ads.