Stange translation of a spacial character in the title !

Hi,

I have a problem when I use this character in a taxonomy term : '

This character, when I put the taxonomy term token in the node title is translated by : '

For example : the taxonomy term : L'auberge is translated by L'auberge in my node title.

I don't have problem with others stpecial characters, and I test all tavailable token (formated, raw...).

Can you help me ?