Vim spellcheck not always working in .tex file. Check region in Vim

Question

I use Vim to write my .tex files, but I am having trouble with the spell checker in Vim. Sometimes it does not check the words, and I think that it might be fo

Answer 1

syntax/tex.vim already uses quite elaborate sync patterns to ensure that the syntax highlighting is accurate, but for long and complex documents, this may still fail.

Best you can do is trying to increase both values of

syn sync maxlines=200
syn sync minlines=50

(e.g. to 2000 and 500). Put this in ~/.vim/after/syntax/tex.vim to override the defaults.

syntax sync fromstart

might give the best results, but may be too slow. You'll find a description of syntax syncing at :help :syn-sync.