Show HN: Lingoku – Learn languages while browsing (supports EN, JP, KR, CN)

Hi HN,

We built Lingoku, a Browser extension that helps professionals improve English, Japanese, Korean, and Chinese naturally while browsing the web. Instead of drills or switching to dictionaries, it offers two modes:

- Translation mode – Instantly translate and explain phrases in context, free translators to use.

- Learning mode – Tracks what you read and provides personalized review sessions with bilingual examples from real websites.

Supports mutual translation and learning across EN ⇄ JP ⇄ KR ⇄ CN.

Motivation: Many friends in Asia struggle to use English (or other languages) confidently at work or while reading foreign-language content in daily life. Constantly switching tabs breaks the flow. Lingoku is lightweight, lives right in the page, and helps you learn passively but effectively.

Built with TypeScript, React, LLM, Chrome Extension MV3.

Try the beta: https://lingoku.ai?c=BetaV1 – free for early users.

Would love feedback from HNers, especially anyone learning languages or building language-related tools.

We added new feature to customize the style of trasnlations.

Free to try. - Lingoku.AI

Click https://lingoku.ai?c=BetaV1 to get free membership