Hunspell is the industry-standard spell-checking engine used by major software like , Google Chrome , Mozilla Firefox , and Adobe InDesign . Because it is open-source and free to download, it is the go-to choice for developers and power users who need high-performance language tools. Where to Download Hunspell English Dictionaries
wooorm/dictionaries: Hunspell dictionaries in UTF-8 - GitHub
Depending on your specific needs (e.g., American vs. British English), you can find official and community-maintained files at these primary sources: