It is when Ia copied source has a lot of special characters like an apostrophe and the formatting replaces them with a bunch of random code that look like French or Turkish letters.
Makes it hard to read some posts.
Copy text into Notepad then copy that text into your post.
Notepad will strip out extraneous hidden code.
c:\windows\notepad
Create shortcut to the desktop and start menu for future use.
Right click on it and Pin to Start and Create shortcut