hunspell VS Emacs-langtool

Hunspell seems popular as well. I believe it's the one used by Firefox and LibreOffice, and I think it's the system spell checker in MacOS already? 🤷‍♂️

Almost all browsers use the Hunspell library for spell checking. You should investigate what methods it uses for stemming and suggesting corrections. How does that algorithm work for non-English languages? The main variation you will see between browsers in spelling suggestions is the base dictionary that is used.

I don't think so. Looking at the Chromium source it appears to use Hunspell. This is an okay spell checker, but not AI based AFAIK, only "Morphological analysis, stemming and generation".

Are you familiar with Hunspell? Dictionaries are comprehensive enough to be part of different Office Suites, so I don't see them as constricted to autocorrect.

If you're using Linux or MacOS, you should try hunspell.

i prefer and use hunspell

One can implement Huntspell which is what all browsers use (for example when typing in text areas). Is very simple and is C++.

Language Tool does this, I believe, but I think it's modal rather than on-the-fly.

Perhaps something like https://github.com/mhayashi1120/Emacs-langtool which you can self host. Or if you don't mind SaaS - there's grammarly integration for emacs too.

There’s already Emacs package, but it works only with offline version.

https://github.com/mhayashi1120/Emacs-langtool

Now that I checked, looks like there’s another package, but I didn’t t try it.

https://github.com/emacs-languagetool

Check out textidote too. It's languagetool understanding \LaTeX syntax, and you can set it for flycheck-checker. Emacs-langtool coupled with langtool-ignore-fonts is also good for \LaTeX documents. You may want to configure them to disable a few rules to reduce false positives.

I use https://github.com/mhayashi1120/Emacs-langtool

Didn't see it so far: LanguageTool integration in Emacs. It really helps me a lot, as I'm a making lot of language errors. LanguageTool requires Java (standalone app is a Jar file), could start is a bit long, but then it's really easy to use and for me feedback is better integrated in Emacs than for example in LibreOffice.