plus & minus doesn'twork

Hello,
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I answer to me...!
The problem is coming from the translation language that I have made.
There are some "'" that broke JS

Hello,

Hello,

I've just bought and installed Vquiz on my website.
When I enter in an existing question or when I create a question the + and - doesn't work.
So, I cant add or remove an option.

A javascript conflict maybe?

If it can help, here is an error detected by the console:
Uncaught SyntaxError: missing ) after argument list in /administrator/index.php?option=com_vquiz&view=quizquestion&quizzesid=31&task=edit&cid[]=134

I have re-installed the component but I have the same problem.

Thanks for your help.