> For the complete documentation index, see [llms.txt](https://docs.wproofreader.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wproofreader.com/v6.11.0/faq/technical/languages/which-spell-and-grammar-check-engines-are-in-use.md).

# Which spell and grammar check engines are in use?

For all languages except American English, we use the Hunspell spell check engine.\
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Moreover, the WebSpellChecker team is working on developing and optimising the mixed engine approach (AI-based/Hunspell/LanguageTool engines combined).