Here is the solution in case someone came across this post in the future.To set the language of your LaTeX file, put :
\usepackage\[french]{babel}
and download the texlive-lang package corresponding :
sudo pacman -S texlive-lang
For Vim enthusiasts and anyone interested in Vim/Neovim!
"VIM is the greatest editor since the stone chisel." - Dr. Jose Unpingco
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Here is the solution in case someone came across this post in the future.To set the language of your LaTeX file, put :
\usepackage\[french]{babel}
and download the texlive-lang package corresponding :
sudo pacman -S texlive-lang
Do you have the language set within the .tex document itself?
/selectlanguage{French}
Or something like that. You may need to /usepackage{babel}
as well or similar. I haven't played around much with LaTeX, so not sure this will work or not--but everything I've seen indicates that the TeX document language setting is what will key the LSP language setting.
On second thought, it looks like it probably isn't even vimtex or LSP related--probably just your vim settings. Try :set spelllang+=fr