Build Studio NG

LanguageTool API

Utility Tools · Content

LanguageTool API is an open-source grammar, spelling, and style checker that supports over 30 languages, offering automated proofreading capabilities for writing tools, content management systems, and educational platforms. Unlike basic spell checkers that only catch misspelled words, LanguageTool performs grammatical analysis to identify agreement errors, incorrect tense usage, punctuation mistakes, style issues, and awkward phrasing that basic spell-check misses.

LanguageTool API Highlights

LanguageTool API is verified for developer integrations in Nigeria and across African markets, providing documented endpoints, sandbox testing, and developer support.

Authentication

API Key

Rate Limit

20 requests per minute on free tier

Sandbox Mode

✗ Not Available

Webhooks

Not verified yet

Supported Regions

Nigeria

Ghana

Kenya

LanguageTool API Services

Grammar checkingSpell checkingStyle suggestionsMultiple languages

Alternative African Company to

Stripe Twilio AWS

LanguageTool API is best for:

Writing tools and editors needing grammar checking and style correction across multiple languages

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API Pricing Model

Free tier (20 requests/min, 20KB/request)
Premium plans from $5.83/month

LanguageTool API Core Features & Capabilities

Features Included

Grammar checking Spell checking Style suggestions Multiple languages Custom rules

Required Access Documents for LanguageTool API

LanguageTool AccountOptional
Can use anonymously with lower limits; register for higher limits and premium features

Different LanguageTool API use cases

Nigerian writing assistant:Add grammar and style checking to a Nigerian document editor or email composition tool
EdTech essay grader:Automatically flag grammar errors in student essays submitted to Nigerian educational platforms
Content moderation aid:Detect poorly written or garbled text in Nigerian user-generated content submissions

LanguageTool API Alternatives