We have two SharePoint 2013 environments (DEV and UAT) and there are differences in the way French characters are displayed between the environments. In the image below the top is from DEV where French characters are displayed correctly, and the bottom is from UAT where French characters are displayed as a question mark inside a diamond.
Things to note:
The Site Collection from DEV is backed up and restored into UAT so I don't know that there would be any configuration difference or anything "inside" the content database.
We checked the SQL collation on the content database in both environments and it is
What could be causing this?