Learn Japanese contextually while browsing

Details

External ID

46296863

Source

HN

Company

—

Product

Learn Japanese contextually while browsing

Website domain

lingoku.ai

Launched

Dec. 17, 2025

Cohort

—

Upvotes

92

Upvotes percentile

0.8893129770992366

Tags

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Fetched at

Sept. 7, 2026, 9:25 p.m.

Updated at

Sept. 7, 2026, 9:25 p.m.

Description

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 translations fit the context (so it distinguishes between different meanings of the same word).since it uses paid AI APIs for the words replacement, I couldn't make it 100% free (server costs are real, unfortunately). However, there is a "forever free" plan with daily credits that doesn't require a credit card. it should be enough for casual daily browsing.I built this because I struggle with Anki burnout and wanted a way to review words without feeling like i am "studying"It supports Chrome, Edge, and Firefox now. would love any feedback or feature requests!https://lingoku.ai/learn-japanese

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