French language et character \

In php file language, in French we have to put a \ before the apostrophe.
example of a line of the file lang FR:
$ lang ["bt_change_item"] = "Change the \ object";
The problem is that this character is reflected in the admin interface, see the screen in attachment.
A solution ?
Thank you very much
example of a line of the file lang FR:
$ lang ["bt_change_item"] = "Change the \ object";
The problem is that this character is reflected in the admin interface, see the screen in attachment.
A solution ?
Thank you very much