Rated 5 out of 5 stars

finally it’s working in Nightly too!
It’s really a cool extension for a Grammar Nazi like me, I wouldn’t want to be caught writing typos or something :)
Thank you Marco for your work!

This review is for a previous version of the add-on (2.54). 

Hello!

Thank you for your comment.

One of the difficulties I was facing was the possessive forms in proper names (I was only adding them if found on Wikipedia).

After someone opened a ticket in LibreOffice's Bugzilla, I had a conversation with a LO developer and he said that all proper names accept possessive.

A few days ago I have improved my tool "Proofing Tool GUI" and in the next months I will work on the possessive forms.

There is still a long way to go but we will get there.

:-)