On Fri, Mar 31, 2023, 08:15 Eli Zaretskii <eliz@gnu.org> wrote:

> > Date: Fri, 31 Mar 2023 07:10:11 +0000
> > From: Gregory Heytings <gregory@heytings.org>
> > cc: rms@gnu.org, m.eliachevitch@posteo.de, emacs-devel@gnu.org
> >
> > > As an aside, a technology I would like to see in Emacs is grammar
> > > checking.  Last I looked, there are no free grammar-checking libraries
> > > or services out there, even just for the English language.  But if
> > > that's no longer true, then adding such capabilities to Emacs will be
> > > very welcome, I think, since word-based spell-checking is clearly not
> > > enough these days.
> >
> > I think that's no longer true, LanguageTool is available (and has been
> for
> > ~20 years): https://github.com/languagetool-org/languagetool .  But
> it's
> > written in Java...
>
> Thanks.  Maybe someone will figure out how to integrate this with
> Emacs.
>

Flymake, or LSP, could be a starting point. Regarding the latter, Eglot
doesn't currently allow more than one server to manage a buffer.
But I'm working on that.

João