Emacs: Grammar checking

Vale and flycheck-vale

brew install vale
(flycheck-vale-setup)

~/Library/Application Support/vale/.vale.ini

StylesPath = styles
MinAlertLevel = suggestion

Packages = proselint, write-good, Google

[*.{md,org}]
BasedOnStyles = Vale, proselint, write-good, Google

Languagetool

brew install languagetoolp