I have two computers. Both have the same problem with libreoffice writer.
On these computers I use Linux Mint 17. ( Mate and xfce)

On a third computer I use Xubuntu, but on that one I do not have the problem. 

I use the language Swedish (Svenska) in the system settings in Linux Mint. This is importat, because if i change to english, the bug dissapear.

The problem is this:

If i write aaa and press right mousebutton the program shuts down. This happens if i want to select some words and copy or so.

This only happens if I select more than two letters. And it also depends on what letters it is. aaa does not work, but abc works. abcd does not work.
If I select more that one line it works. 
So the problem is only when I try to cut or copy more than 2 letters, but not more than one line.

I have tried to reinstall libreoffice writer but that did not help. Some earlier versions also hade this problem.