WProofreader core v6.13.0 migrates AI writing assistant operations to new models and restores its Google Docs support, improves AI-based proofreading and autocomplete quality, expands multilingual dictionaries with 1400+ words, introduces limits for custom dictionaries and style guide collections, updates Ukrainian and Finnish dictionaries, and delivers a security update.
📝 TL;DR
- Migrated AI writing assistant models across multiple languages to Amazon and Google alternatives following the deprecation of Anthropic Claude models and to optimize performance
- Updated the Ukrainian and Finnish dictionaries
- Expanded dictionaries with 1,400+ new words across English, German, Spanish and Portuguese with common words, medical terminology, additional proper names and abbreviations
- Improved spelling quality with better handling of Greek capitalized words
- Improved filtering of autocomplete suggestions containing sensitive or discriminatory language
- Updated style guidance with new Spanish anglicism rules
- Improved AI proofreading quality across all supported models and enhanced Spanish AI proofreading v3.0 for more reliable corrections.
- Restored AI writing assistant compatibility with Google Docs
- Security update. Updated OpenTelemetry to address CVE-2026-45292
🛠 Enhancements
WProofreader JS core (v3.42.6057)
- Improved Google Docs compatibility. Fixed issues preventing AI writing assistant from working correctly in Google Docs.
AI writing assistant
- Migrated the English AI writing assistant from Anthropic Claude Haiku 3 following its deprecation. For more information, review documentation current English models.
- Migrated selected Norwegian, Italian, Spanish, and Danish AI writing assistant workflows from Anthropic Claude Sonnet 4 following its deprecation.
- Updated prompts and migrated the German and Ukrainian AI writing assistant from Anthropic Claude Haiku 4.5 to boost performance.
- Improved AI writing assistant prompts across Dutch, Swedish, Portuguese, and Polish for more consistent rewriting, tone adjustment, shortening, and expansion results.
Spelling
- Improved handling of Greek all-caps words, like ΕΙΔΗΣΗ.
- Expanded dictionaries with 1,000+ new words across English, German, Spanish, and Portuguese, covering abbreviations, affixes, biology, common words, dialectal variations, food, linguistics, music, proper names, slang, and technology.
- Enriched shared cross-language dictionaries with 30+ proper names and abbreviations, like Googlebot and ISO.
- Enhanced English and Spanish medical terminology with 471 new words covering medical terms, legal terminology, abbreviations, and related vocabulary.
- Expanded English dialect coverage with new dialectal word pairs, such as radiolabeled vs radiolabelled.
- Refined suggestion rules for common English and Spanish misspellings, such as gritings → greetings.
Custom dictionary
- Added a limitation on the number of custom dictionaries depending on the subscription plan. Up to 250 for self-hosted.
Style
- Added a limitation on the number of style guide collections depending on the subscription plan. Up to 250 for self-hosted.
- Made ‘collection’ parameter required for any actions with style guide rules using API
- Updated Spanish style guide with new anglicism rules, such as download, shopping center, etc.
- Added the possibility to use part from the pattern field in suggestion filed. For example, Lehrer → Lehrer*in
AI proofreading
- Improved AI proofreading quality across English, German, and Spanish in punctuation and spacing handling, including decimal commas, en dashes, and punctuation around corrected text.
- Improved Spanish correction accuracy by preventing redundant pronouns, unnecessary punctuation, degree symbols, square brackets, and duplicate suggestions.
- Improved suggestion quality in German by restricting word removal at the end of German sentences.
Autocomplete
- Improved filtering of autocomplete suggestions containing sensitive, unexpected, or discriminatory language, such as war, drug, etc.
Languages
- Updated the Ukrainian (uk_UA) Hunspell dictionary to v6.8.0 (Apr 23, 2026) by Rysin, A. and Starko, V., which included an expansion of the dictionary with 12,000+ entries. Source: https://github.com/brown-uk/dict_uk/releases#release-v6.8.0
- Updated the Finnish (fi_FI) Hunspell dictionary to v0.2 (Dec 6, 2023) by Voiko, significantly expanding vocabulary coverage across technical, medical, and proper names. Source: https://github.com/fginter/hunspell-fi/releases/tag/0.2
🛡 Security
- OpenTelemetry upgrade: Updated opentelemetry to 1.62.0 to address CVE-2026-45292. Scope: components depending on opentelemetry (direct or transitive) packaging of langtool/libs.
🐞 Bug fixes
- WProofreader JS core: AI writing assistant doesn’t work in Google Docs
- AI writing assistant stopped working for free extension for auto-detect language