I thought I understood the “Do not check spelling or grammar” option under Tools > Language > Set Language, but I’m still puzzled about part of it.
A document I worked on had this option checked, so I unchecked it, then clicked the “Default” button and answered Yes to the “Do you want to change the default language to English?” question. (I’ve discovered that if you don’t do this second part, the box does not stay unchecked.)
Someone else then added a new paragraph to the document, and when he ran a spell check he got the message, “Text marked with ‘Do not check spelling or grammar’ was skipped.” I took a look and the “Do not check spelling or grammar” box was still unchecked. However, when I selected the paragraph he had added and looked at the box, it was checked.
So my question is: If a document has the “Do not check spelling or grammar” box unchecked, why would the box become checked for any new text?