The spell check that comes with SharePoint isn’t ideal. Why not just use the one that is in the browser? Well it doesn’t read the input fields in SharePoint.
There’s a simple script you can add to custom JS that will enable the browser spell check in the input fields. It will underline the misspelled word and give you options if you right click, just like it’s supposed to.
Here’s the simple script:
function dffs_ready(){
jQuery(document.getElementById(‘onetIDListForm’).setAttribute(“spellcheck”,”true”));
}
I wrapped it in dffs_ready because it doesn’t always load in time otherwise. Enjoy!