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LanguageTool (랭귀지툴)

Open-source-based grammar checker supporting 30+ languages

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What is LanguageTool (랭귀지툴)?

Catches grammar, spelling, and style errors across 30+ languages including English, German, and Spanish. Being open-source-based, much of it is usable for free, making it handy for people who write in several foreign languages (note: it does not support Korean).

How to start in 5 minutes

  1. Go to languagetool.org (free to use without signing up)
  2. Paste the foreign-language text to check
  3. Click the underlined errors to see correction suggestions
  4. Use the browser extension/Office integration for on-the-fly checking

Pricing

PlanPriceWhat you get
FreeFree
  • 2,000 characters per text
  • Basic grammar and spelling
  • 30+ languages
Premium$19.9/mo
  • 20,000+ additional checks
  • Up to 150,000 characters per text
  • Advanced style and punctuation

Price unverified: the official pricing page failed to display amounts, so the Premium price needs re-confirmation. The free plan (2,000-char limit) is confirmed. · Exchange rate applied: 1 USD ≈ 1497 KRW. Prices can change — check the official site.

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