AI Grammar and Tone Checker Specialized for Non-Native English Business Writers
Non-native English speakers writing business emails, reports, and Slack messages need more than grammar correction, they need tone guidance (too formal? too casual?), idiom suggestions, and cultural context. Grammarly serves native speakers well but its suggestions don't address L2-specific patterns. Ludwig on IH built a linguistics search engine. The wedge is a writing assistant trained on non-native English patterns: detecting L1 interference (Spanish speakers writing 'actually' when they mean 'currently'), suggesting natural business phrasing, and providing tone calibration for corporate email communication.
Problem Statement
A German marketing manager writes an email to a US client: 'I will come back to you until Friday with the detailed proposal. Please find attached the presentation from yesterday's meeting.' Grammarly marks this as correct. But 'come back to you until Friday' should be 'get back to you by Friday' (German L1 interference: 'bis' = 'until' in German, 'by' in English time context). 'Please find attached' is grammatically correct but sounds stiff in a modern business email — 'I've attached the presentation' is more natural. These aren't grammar errors; they're fluency gaps that Grammarly doesn't address.
The Idea
A writing assistant for non-native English business writers that detects L1 interference patterns, suggests natural business phrasing, and provides email tone calibration, addressing the gap between 'grammatically correct' and 'sounds native.'
Why Now
1.5 billion people speak English as L2 globally. 80% of international business communication is conducted in English by non-native speakers. Grammarly serves native speakers, its suggestions often sound unnatural to L2 writers because they correct grammar without addressing phrasing patterns. LLMs can now detect L1 interference and suggest idiomatically natural alternatives. The remote work explosion means more non-native speakers write English business emails daily without native-speaker colleagues to proofread.
Target User
Non-native English speakers in professional roles who write 10+ business emails per day in English
Target Market
Writing assistance and language learning tools for professional L2 English writers
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