Based on emails we have recieved from you all, we were able to figure out that issue was either not reproducible or that the feature was not being used correctly.
Closing this issue was for now. Let us know in case you encounter the issue again
An error occurred while saving the commentK Martin commented
My spellcheck is not working either. What is going on? OS 10.13.6 , InDesign CC 14.0. I spend a lot of money on this product. Not happy.