ProLexis review
A deep French and English correction suite for publishing teams with a premium annual price.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
ProLexis is professional writing-correction software from Diagonal for French-language professionals, frequent writers and publishing teams. It checks French and English spelling, syntax, grammar, semantics, style and typography. Its language recognition covers French, English, Spanish, German and Italian in one text, while correction focuses on French and English. Windows and macOS support, desktop applications and browser access make it suitable for teams working across editorial and office environments.
The strongest fit is for organisations that need more than basic spelling correction. ProLexis analyses homophones and paronyms in context, flags familiar words, pleonasms and imperfect phrasing, and supports configurable typography rules. Personal dictionaries and shared correction settings can help align editorial preferences across a team. The companion Myriade dictionaries add definitions, synonyms, antonyms, expressions and conjugation resources, giving writers additional language-reference tools alongside correction.
Its ecosystem is a major consideration for publishing workflows. Integrations include Microsoft Word, PowerPoint and Outlook; OpenOffice Writer, LibreOffice Writer and Thunderbird; and desktop-publishing applications such as Adobe InDesign, Illustrator, InCopy and QuarkXPress. Trados, Google Chrome, CKEditor, FCKEditor and TinyMCE are also supported, while WebService integration connects ProLexis with CMS and editorial tools. The ProLexis & Myriade plan costs €240 per device per year, billed annually, and a 30-day demonstration version is available. Choose it for professional multilingual publishing workflows that value detailed French correction and typography control. Writers seeking a lower-cost general checker may prefer a simpler alternative.
ProLexis pros and cons
- Where it wins
- Deep French and English spelling, grammar, syntax and style analysis
- Typography rules, personal dictionaries and shared correction settings
- Integrations across office, publishing, CMS and editorial tools
- Where it doesn't
- €240 per device per year is a significant recurring cost
- No free plan for ongoing use without a subscription
- The Chrome extension documentation focuses on Windows integration
ProLexis fact sheet, pricing and score →
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