Error for single quote in alias

Hello,
as the title say even tough it is accepted by nagios, and valid in JSON string, i can't use single quote ( ' ) in alias (big problem for french).
I tried escaping it with the "'" form and with the "\u0027" forms with the same result.
I'm always getting an http 400 error so i guess that's on the nagrestconf webserver side that the problem lay?
Any idea how to solve that?
thanks