At Chapter 3, if it is possible to configure the spell check language, it would be nice to say it somewhere. For example, how to change it to Portuguese language?
Other useful buttons in the R Markdown \emph{Source} pane's top bar include the \texttt{ABC} spell check icon and question mark icon, which gives you a Markdown syntax reference file in the Help pane.
At Chapter 3, if it is possible to configure the spell check language, it would be nice to say it somewhere. For example, how to change it to Portuguese language?