Spell checking common document formats including latex, markdown,
manual pages, and description files. Includes utilities to automate
checking of documentation and vignettes as a unit test during 'R CMD
check'. Both British and American English are supported out of the box
and other languages can be added. In addition, packages may define a
'wordlist' to allow custom terminology without having to abuse
punctuation.

Homepage:
https://CRAN.R-project.org/package=spelling
